Personal favorite MS mouse -- even today at 2012
584241
This mouse may be the best Microsoft mouse that was ever made. Event today in 2012, I would still rate this mouse as one of my top 5 favorite mouse. I own other top end mice before. I have R.A.T 7, Steel Series, Logitech G9, and various Razers (favorite is the Deathadder), but this MS mouse stands on its own. Even though the technology is optical, rather than laser, I have never experienced lags or tracking problems while playing games. The mice is sturdy, ergonomically close to perfection and the price is right. The mice even looks great!

I would recommend Microsoft make an updated version of this mouse with a laser technology, or the bluetrack, but don't change the form factor. This mouse is that good.

Highly, highly recommend it if you can get one around $35 or less.
2161410
Having had this for a couple of years (3 years) now, you can't really go wrong with this mouse. The functionality, durability, and customization are unmatched. No offense to the other fanboys lol along with the other products reviewed before
3051255
As this is my second Logitech G700 Wireless Laser Gaming Mouse (I bought the original non-"s" model on release), so you can tell how much I like them.  As a "claw" style mouse user I found the shape and size just right for long gaming and web browsing sessions.  I have used this mouse with most of the bigger games out right now- Mass Effect 3, Civilization 5, Team Fortress 2 in extended use and have had no issues.  The wireless charge lasts longer that you will want to play, and the ergonomic shape helps me avoid wrist issues. The "s" model has some nice new surface treatments which help grip as well- I found those to be nice touches.

Packaging: somewhat Apple-like in that someone clearly spent some time and care putting a nice presentation together.  Everything looks nice, and is easy to get at everything.  No knives, scissors or battle axes needed for once- so kudos to Logitech.

Installation:  You will need two free USB ports, with one preferably on the front (or near the front) of the machine.  If you don't have one near the front, Logitech is smart enough to have provided a USB extender cable for the wireless dongle.  The other USB port is for the charging cable (which allows for wired use as well- you can charge and use it at the same time if needed).  I used an out of the way USB port in an external USB hub without issue for this.  While the mouse and dongle are plug and play in Windows 7, I would strongly recommend downloading the Logitech Gaming Software.  This is the best way to use all the amazing options this mouse has.  I have used both the 32bit (at work) and the 64bit (my gaming machine) versions.  From the software you can easily adjust the DPI Sensitivity levels, the polling rate of the mouse, add, remove or adjust individual game profiles (important for RTS and MMO players) and even adjust the power settings for power saving or max gaming. So not only did it have all the features I wanted, it had a few I never even considered.

Use: My original G700 has seen extremely heavy use since I got it with zero issues.  Despite daily use, the battery still charges up nicely.  I have never had any driver crashes or issues, and Logitech does a nice job of updating the Gaming Software over time.  The new "s" version has 10 hours of gaming on it already (it came with a decent charge fortunately) and I like the updates they did on it.  My old G700 is now on my work machine, where it is a massive improvement over the crap Dell mouse that came with that system. The G700 just works right.  Day after day, game after game.

Final thoughts:  if you are a claw style user and are looking for the best value and capabilities in a Wireless Laser gaming mouse, it is very hard to beat the G700s mouse in conjunction with the Logitech Gaming Software.  Highly recommended.
248253
I bought this mouse at least four years ago and it still scrolls and clicks great. I recently got another as a backup standby and it remains in the package because it's as yet unneeded. At first, the left and right click contours forced my fingers further apart than I was used to but I soon took to it. The thumb buttons are perfectly located natural feeling. Once you use thumb buttons, you won't go back to a three button mouse. I never use the DPI button. The wheel scrolling clicks or notches are not as sharp as I would like for gaming use but are rarely a problem. Also after a while the plastic on plastic contact in the mechanism underneath the finger buttons can cause them to creep, requiring Vaseline or some other lube to be applied in order to restore super crisp clicking. I suspect most users would not notice it and also that most mice will develop some degree of button creep anyway. Overall a great value; I like it so much I bought it twice.
3428738
1+ Year Use Review. Over a year later, and this is still my favorite mouse! It feels great in my hand and is customizable to many degrees, especially if you program it with the Logitech software which you can download from their websites. You can customize battery usage, there 8 additional buttons, besides the two main buttons and the scroll wheel...ALL BUTTONS ARE REPROGRAMMABLE. I use the mouse at work for graphic design, which it is great for, but it's also good for PC games. The mouse can pretty much be used on any flat surface. I did my research before buying this mouse and I am still very happy with my purchase. When I originally bought it, it was twice the price it is now, so if you are looking for a decent mouse and this is under $30, do yourself a favor and make the purchase. The G602 is about 5in in length, so it's not a tiny mouse, good for extended usage.
3491542
NOTE: I don't believe anyone should give a review until the item has been used about a year ( Unless the item stops working in less than that time.)
I was reluctant to do this but here  goes.
From the beginning of my computer experience 1989 to 2007 I only used Logetech mice. Specifically the Mouseman. I still have 2 of my 3 original Mousemen, they don't look good but they work very well. I only bought new ones to get extra functionality, not to replace faulty equipment.
From 2008 to 2011 I have owned 4 different "Top of the Line" Logitech mice. They lasted from 1 month to 1.5 years before becoming totally unusable. The list is as follows:

M 525:  Less than 6 months. (Demagnetizing didn't work) Button failure. (Double clicking, Won't hold)
M 705 Marathon: Less than 1 year.  (Demagnetizing didn't work) Button failure.
Anywhere MX:  1.5 years after using the internet to find out how to demagnetize it. After 1.5 years button failure.
Performance MX: Less than 1 month.  (Demagnetizing didn't work) Button failure.

All of the above mice initially had poor tracking performance compared to the original Trackman corded mice. I attributed it partially to Microsoft's degrading Windows quality. After this dismal performance record I swore off Logitech and promised myself never to buy another Logitech.
Well, I happened to be at a computer shop that said I shouldn't be having these thoughts and was talked into a cheap Logetech M325 for the sum of $12 full retail.

I was fairly impressed, I got 1.5 years out of that mouse before the buttons wouldn't work like the other four failures. It still had only acceptable tracking from new, but at $12 and 1.5 years with today's dismal manufacturing performance. It was not a bargain but acceptable, so I went against my better judgment and bought another Logitech. An M 510, (because I liked its feature set).
I had a fresh load of Win 7 and a brand new mouse, things looked good except for slightly erratic mouse movement that I attributed to a white table surface and no mouse pad (I now live on a small boat and use the drop down table as a mouse pad).
Well things got worse as weeks went by. Because I liked the M 510 features I scoured the internet to find fixes for the logitech mouse:
I:
Demagnetized
Adjusted settings.
Downloaded drivers.
Deleted Setpoint.
Installed old versions of Setpoint.
Uninstalled programs.
Laughed at some of the fixes.
Cried at some of the fixes.

The mouse only got worse, until tracking was a joke. The M 510 can no longer be considered an interface device. I guess coupled with the worlds smartest operating system Windows, (Quote from Bill Gates.) It developed a mind of it's own.
Time frame???  How about 1.5 months!!!!!!!!!!!!!!!!

I've called Logitech, they said they never heard of these problems before???????? Huh: The internet is full of Logitech fixes. Logitech's solution: Demagnetize, Demagnetize, Demagnetize , Demagnetize , Demagnetize , Demagnetize.
And if that doesn't work , Demagnetize. As if it could never be a mechanical problem!!
(Guess if you think I'm off Logitech for good this time. My Google search is now Mouse ---logitech. (That's 3 minuses), in case Google doesn't get it the first time)

The only way I can figure Logitech gets all the 5 star reviews is that it found writing reviews a more cost effective method of doing business than "Building a Better Mouse Trap".

(This document was written with the aid of a Radio Shack Gigaware $8 mouse, which I have to have as backup for high end "performance mice".)
I have now given up on feature sets and focused on pure cost criteria and no cordless. At least the cheaper cost factor last longer??
447356
This mouse is superb in pretty much every aspect that you can assess a mouse.  In overall usability, it's great.  It feels nice in the hand (albeit my hands aren't huge, but certainly not small) but it's still a size that makes it easily portable with a laptop.  One of my favorite features is the scroll wheel.  It's incredibly smooth.  Impressively, the scroll wheel has remained smooth even after years of using the mouse intensively (hours a day).  It's not as smooth as the day I got it, but it's still frictionless enough to scroll to the top and bottom of almost any page with just a quick swipe.  Another great aspect of this mouse is its ability to control aspects of the computer with the various buttons and directional scroll wheel.  Using it, I'm able to control my iTunes (next, previous, play, pause) and control the computer volume with the directional ability of the scroll wheel.  Battery life is excellent.

However, even with all of that said, the most impressive aspect of this mouse, for me at least, has been its durability.  I have used it for years now and I've dropped it many times on very hard floors.  Now, it should be noted that this doesn't mean I threw it down a flight of steps, but I'm talking about legitimate drops from an average height desk.  Sometimes after a fall the batteries and battery cover pop out, but never has the mouse sustained any damage whatsoever.  Maybe I've been lucky, but it seems incredibly durable.  I also frequently carry it around in my backpack and the scroll wheel gets pushed in pretty hard, but it's never broken.  Also, not to say the mouse is water-resistant, but I use this mouse so frequently that just in normal use, after washing my hands, I've touched it and gotten it wet numerous times.  Never any damage.

In the end, you really can't go wrong with this mouse.  I've bought additional ones as gifts and everyone whom I've given one to has loved it.
4779337
This is my third mouse in about 18 months. This one will stick around awhile, I think. My last 2 mouses werre Microsoft Wireless mouses - Wireless Optical Blue and Wireless Intellmouse Explorer. Both were certainly adaquete, but had issues: The Wireless Optical Mouse Blue was a small for my hand, and the mouse was jerky. The Wireless Intellimouse Explorer was a huge leap further. 2 Extra buttons, much larger, and much more ergonomic. The mouse was still a little jerky but significantly better.
Both Microsoft mouses had a common issue. I was frequently accidently clicking the right button. Some corded mouses gave me this issue too, but it was by far most pronounced on those wireless mouses. So that was a criteria for my next mouse - a better right button. I tried both an MX700 and this mouse (Cordless Click! Plus Optical) and the MX700 had the light touch right button. The CC+O, however, had a vert stiff right button. Not so stiff as to prevent intentional right clicks, but to prevent accidental ones. So if you're like me, and find yourself unintentionally right clicking a lot, consider this mouse.
Furthermore, the extra buttons are nice. The Back/Forward buttons, while not tremendously useful, are nice. The real surprise though, was the "Quick-Switch" button located south of the wheel. I assumed it would be useful in games (just having an extra button), but shockingly, it's extremely useful in Windows as well. Clicking it pops up a menu duplicating the taskbar listing the windows that are open. Only - the list is sorted such that it is _extremely_ easy to switch between two windows. The top entry will only change between the active window and the window you're alternating with. It's useful for multiple windows as well, but seems to have been designed for two amongst many.
Ergonomically, this mouse is nice (though a bit smaller than my old Intellimouse). There are curved ledges to rest your thumb and pinky on, and to hit the forward/back buttons, an upward twist of your thumb is all you need. I did find my pinky dragged alongside the mouse, but it was less than with any mouse except my Intellimouse.
The biggest downside to this mouse is the driver. Both MS mouses let me customize the buttons actions on a per-application basis. In iTunes, or Winamp, for instance, I could make forward/back correspond to next/prev song. Logitech forces this on a system-wide basis. The other thing is that in games, the extra buttons on the MS mouse, back/fwd just showed up as extra buttons 4 and 5. On this mouse, games don't even recognize they've been clicked. The workaround is to go into the mouse properties in the Control panel, and specify Back/Forward/Quick Switch to correspond to keystokes - but here, options on a per-application basis would be far better than having to switch the options going between apps and games.
Despite the negative, this is the best mouse I've ever owned. I would only suggest it if you have the right-click problem I do - otherwise, the MX700, though more costly, offer an extra 2 buttons and needs no batteries.
4813114
I'm still using this mouse. It's great. I've dropped it plenty of times and it's holding up surprisingly well (4 ft drop, solid concrete garage--don't ask Lol).
As for USE, it's great. A bunch of people are baffled by the 3rd button (ring finger button) that apparently does nothing. It's an on-the-fly sensitivity switch. Great for making precise motions (Narrow scrolling, FPS Zoom/sniping, precise dragging, whatever). In addition to that, there's a convenient (Though rarely used) DPI switch in the middle. I am loving the horizontal and vertical scroll combo. Excellent feature. As for feel, it feels solid. Compared to the only crappy logitech thumb trackball you can buy in stores, I'd go with this ELECOM. The ball feels smoother, still easy to clean, and it feels like a more ergonomic fit for my hands.
Had this for months. Great on battery life, but I never really got to see its best since I replaced the stock battery after a couple months with a new set. All in all, I hope that this is still available if/when this eventually breaks. It's VERY hard to find a good *thumb* trackball.
908442
Great mouse.  It lasted 5 years,  but I overuse my computer, so it should last longer for a normal user.  My only complaint is that Microsoft doesn't make a newer model that has all of the features as this one.  4-way scroll, it NOT being Bluetooth, and incredibly long battery life are its positives.  The flick scroll takes some getting used to, but once you use it, you really don't want a normal mouse wheel again.  Its failure was the left-mouse-button started bouncing (random double-clicks) So I bought another one.  Although it failed, I gave it 5 stars anyway,  because it worked that well for me!
3209396
I've had this mouse for over 5 years and I have never found another that compares to it.  Logitech sadly no longer offers this model which stinks because I have used mine so much the paint is wearing off.  All of the buttons and functionality are unmatched.  You can start up Windows Media Player just with the touch of the 'media' button, control volume, fast forward/rewind/seek with another set, play/pause, forward/back browser buttons, 2-axis scrolling wheel, and great battery life.  If mine ever wears out I will be very sad.

**Update** 2/25/13
My mouse did wear out unfortunately, and it was a pain to find a new one. I bought a new one from some very questionable Chinese website because I wanted one so badly (And didn't want to pay the ransom that the one new one on Amazon costs).
I had to get a new credit card number not long after, but my mouse is worth it!  I hope it lasts another 7 years or at least until I break down and buy a nice touch-screen tablet.
1139680
I had the old M65 and it was getting worn so I decided to pre-break replace it with the newer M65 pro since it was fairly cheap at $35 and has a very good optical sensor. Out of all the mice I have ever used the M65 is probably my favorite, something about the shape just sits right in my hand, the buttons are very good and sensitive and the sensors work extremely well. The CUE software is very intense and will take some time  to learn but is also very powerful and kind of cool. I don't really care about lighting options and mostly keep it dark, but the colors for different dpi is very useful for at a glance switching. The only con of this mouse is the heavy weight, which can be lightened by taking out the 3 weights inside of it, but in general after extended use it can lead to hand cramps etc. That said, I have grown to like the weight as it adds some stability to my aim in fast moving fps like Titanfall 2, Battlefield 1 and 4, and Overwatch.

tl;dr - very good mouse, would recommend
2741841
I've used a bunch of mice, and this one beats everything, hands down. In fact, I love it so much that I own three: one for my home desk, one for my work desk, and one to go mobile with on the road. After using this mouse for a few years, here's my take on it:

Positives:
+ The ergonomics on this mouse are very well thought-out. My hand doesn't get fatigued after extended use (10 hr days at work). The mouse contours well to my hand, and I esp. appreciate the groove where the thumb rests. Buttons are all placed logically and are easy to access.
+ Scroll wheel works well, and has two different speeds (one that clicks and the other is a smooth, faster scroll, very handy for going through length documents or pages online).
+ Darkfield technology works on lots of surfaces, including glass, which amazes me. It works well while you travel, as you don't need to worry about bringing a mouse pad.
+  Runs on AA battery, which is convenient for me (I have rechargeable Eneloop AA batteries in my mice and recharge it once every few weeks).
+ Plug and play ease of use, no drivers needed to download or install (using on Mac).

Negatives:
- USB receiver: it's small, but that also means it's easy to lose. Would've been cool if the mouse used bluetooth technology. I also found that the receiver for this particular mouse suffers from a disrupted signal whenever you plug a USB3 device in the adjacent port next to it. This has happened to all of my mice so it's definitely not an isolated incident.
1475618
Oh my goodness! I cannot stop grinning as I write this review. I received my G700s this morning and am already in love. My previous love was a Microsoft Sidewinder that I have had since 2007, which of course is now discontinued. I tried another mouse before this one (Gigabyte Aivia Krypton) which was awful. I have never been a fan of wireless mice as they always seem to die at the most inopportune times (i.e. fighting a raid boss). However, after speaking to a fellow gamer who swears by Logitech mice, and loving my Logitech keyboard, I decided I didn't have much to lose. And oh boy is that not an understatement.

Straight out of the box, the set up was a breeze, and into my hand...oh the joy! I feel like this mouse was made for me. I do have smaller hands and was concerned after all the comments on its size, but it is perfect. I feel perfectly supported and the buttons could not be placed any better. They are out of the way enough that I don't feel like I will be misclicking, but close enough that when I need them, they are right there. AMAZING!!

The companion software must be downloaded from Logitech, but that took a few seconds and is incredibly intuitive and easy to use.

Pros:
-Fits and feels like a pro. The texture is enough to help grip without being uncomfortable
-Buttons are very well placed
-Easy to adjust sensitivity settings
-Clicking noise is there, but not annoying
-It is very smooth on my wood desk
-It works and feels like a dream
-It can function wirelessly or wired (you can choose and change your mind as you wish)
-Easy to program

Cons:
-I don't have any yet, but will come back after I've had the mouse longer. :)

Summary:
Buy it! This is the end game and you will be pleased. If I'm wrong, it is easy to return and has a nice warranty, but I really doubt that would be the case. :)
615011
This keyboard mouse combo is simply awesome. The seriously hefty bluelight mouse tracks on any surface and has browser back and forward buttons that work to do similar things in most applications (at least in office and others) and sideways scroll too. It has functions I don't even know about. The keyboard likewise has an amazing array of extra keys that don't have to be programed, they just work includes labels in bright silver on the front of every key that has an associated control function (i.e. *New on the N *undo on the Z and many I never knew about). Function keys all have little pictures explaining their usual function and there's another whole row of 19 keys above the F keys  for stuff like multimedia and customizable buttons to open programs. Batteries last 6 months or more and click action is great. The only reason I've had to get new ones is cause I'm always spilling wine or grapefruit juice on the keyboard - I'm talking whole glassfuls not minor spills. I can usually clean it up but after awhile  .  .  .  I've had others but nothing compares to the 5000 which I'm guessing is why the same model has been microsoft's top of the line for at least 5 years now.
1893252
I've bought a couple of these and I've recommended them to dozens of friends and clients (I'm a PC builder) who absolutely love it, and what's not to love?  It's light-weight with several 3.6g weight for tuning with dozens of positions to lock them in to get the center of gravity correct, the switches are solid but not too light that I accidentally click them like some other mice I've owned from other big brands, there's not an overload of buttons in any 1 zone, buttons are large and easy to hit every time, the grip is pretty great for palm/hybrid/claw grip and is plenty long to comfortably rest my long fingers.  The laser sensor doesn't feel like it has any acceleration and tracks better on sketchy surfaces when I take one to a friend's house than my mice with the infamous Avago 3310.  The braided cable is absolutely frictionless on both my glass and wood desks, and the scroll wheel is my absolute favorite of any mouse I've ever used.  Some people prefer a rubber grip on the wheel but I've never slipped while scrolling and the rubber on my vx revolution wore out after about 5 years of use, but there's no rubber to wear out here. The side scrolling is sometimes hard to find in good mice these days (I LOVE my Mionix mice but c'mon guys, none on my Corsair M95 either).  My only regret is that I just heard they announced the g502 spectrum, but I guess I'll be getting at least 1 of those and giving away one of these now.  Keep in mind that it a bit thinner of a grip than many other mice, if you have bigger fingers you may consider something larger like the Mionix Caster/Naos or the Corsiar M95, but I have a couple friends with big hands that still love this mouse more than those with wider grips.
4935123
Great mouse overall! Some small room for improvement, but customer service was quick and easy.

I've had this mouse for about 9 months now and have been using it constantly--easily 12+ hours per day average. I've primarily been playing MMOs and some FPS games and utilizing the side pad, but also use the mouse for work. It's slightly larger than the Razor Naga, so it fits my hand better. I'm a claw grip so I kept the numpad in the Farthest back position. I think the movable side keypad is a great feature for different grip styles, and I haven't had any problems with it coming loose or moving on its own.

The included Corsair Utility Engine is great and IMO is the biggest selling point of this mouse over other MMO mice. You're able to setup profiles and program any button on the mouse to any function. Most of the time I mapped the pad to the numpad as that's the easiest for MMOs, but you can also assign any button on the keyboard, profile selection, DPI change, any type of click, back/forward, or anything you can make in the included macro programmer. The only thing I haven't figured out how to do is get the lights on the mouse to change when I click different buttons. The functionality appears to actually be there, but I haven't gotten around to playing with it too much. It's definitely superior to the Razor app.

Recently the left-click switch went bad and gave me the dreaded double-click problem where a single click registers as a double click. This is a common thing to happen to heavily used mice and I've had it happen on several from other manufacturers in the past. Signing up on Corsair's site and getting an RMA was smooth and easy. I got a new mouse inside of a week even without using their cross-shipping option. Obviously I would have preferred the button last longer, but the 3 Nagas I had before only lasted about a year while under much less strenuous use (probably only 8hours/day average), so this one's done pretty well. I would encourage Corsair to put a longer lasting switch in under this most-used button if they want to reduce RMAs.

Both the original mouse and my replacement have some trouble with tracking on my pure black mousepad. Folding a white piece of paper over it fixed it instantly so I think the optical sensor just doesn't see black well enough.

Again, overall I'm very happy with this mouse. It fits my hand. The lights can be changed to any color or turned off completely. The buttons can be remapped however you choose thanks to a great companion app. Weight and build quality feel good and there's very little room for improvement.

Highly recommend!