Possibly the best mouse you can buy
921528
When I first saw the first Microsoft optical mouse demostrated several years ago, I laughed and thought that it would never catch on. Now it has become an indespensible part of my computer, both at home and at work.
By replacing the ball in mice with a beam of light, people now don't have to clean out the rollers in their mice or deal with them sticking or now tracking properly. After cleaning out other people's mice when I've had to use their computers, you get sick of cleaning out the junk.
Pro's:
  -Doesn't jam or get stuck in one place
  -Fairly responsive
  -USB connection
  -Works on a wide range of systems, including my ancient Macintosh.

Con's:
  -Will not respond if the surface the mouse is resting on is one color or overly reflective. Most of the time this will not occur.
  -Having to use non-optical mice on other computers.
2139632
This mouse is one of my favorite mice that I have ever owned. It fits my hand perfectly, is just the right weight, has a great braided chord and looks really cool with the lighting.  The software works great and has a ton of customization available.  All the button clicks are perfectly adjusted.  You don't feel like you have to smash on any of them including the middle mouse button which I often find annoying on other mice. I own 2 of these mice, one for work and one at home for my gaming. This mouse is well wroth the price.
3915761
This literally is the best mouse I've ever used. It fits my hand very well, it's comfortable to the point of multi-hour use, the action buttons are kind of akwardly placed, but to no inconvenience. The build is fantastic for such a cheap mouse. As always, Microsoft excel in this field, as my last Microsoft mouse lasted 2 years. I paid 8 dollars for it. I don't know how they do it, but it's done to near perfection. If you need a cheap, but top-of-the-line gaming mouse, this is for you.
2178354
This a phenomenal product.  I was skeptical since you typically get what you pay for.  In this case, you get more than you pay!  The features of this mouse a intelligent, sleek, and make sense!  The mouse puts itself to sleep after a few minutes of inactivity and has 3 modes.  On without lights, on with lights and off.  The lightless mode is nice for conserving battery life (I don't know how much this uses but it seems minimal).  I almost always use the lit mode so I can see when my mouse is active.  The silent clicks are my absolute favorite feature though.  It takes a minute to recalibrate your brain and trust that the mouse still works without sounding like a wood pecker.  The design is very comfortable and fits nicely in my hand.  The adjustable DPI is great as well which allows you to adjust how fast the pointer moves with just a click or two of the DPI button (located on the mouse).  This prevents you from having to go into settings and adjust.  Battery life is great from what I can tell.  I've never ran a battery dead yet but I go a month or two between charges of (1) AA battery.  This is the mouse I prefer to use and I have a few others that cost way more and function poorly compared this one.  I highly recommend it.

*This review was not prompted by Habor or sponsored in any way.  I just genuinely love this mouse after months of use.  BUT....Habor, if you want to send me another model of your mice to review, I wouldn't mind that ;)
4248779
This is the best mouse you can buy for the price. Its buttons are silent when clicked and they feel like velvet. It's got internal lights that look cool if you're into that, but you can turn them off if you're into a less ostentatious look. Decent weight, lot's of DPI levels for tweaking perfectly to your liking. This feels like a $90 mouse. Do yourself a favor and buy this, then spend the $77 you saved on tacos.
1129978
This is a fairly lengthy review, so skip to the TL;DR if you want!

Build: At 3" wide and 4" long, the Xornet is fairly round compared to other mice. along with slightly groved mouse buttons it has an indentation for your ring finger that may take time to get used to but that I adjusted to fairly quickly and find very comfortable. The shell itself is regular old non-rubberized hard plastic and may bother those with sweaty palms compared to some of the nicer coatings on the market. The sides of the mouse are real rubber, squishier than those on the Deathadder '13: I found them quite comfortable and they allowed a lot of grip even during intense play -- making lifting the mouse quite easy for its 142g weight. The scroll wheel is nice and tactile, not as nice as those on Roccat mice and about equal to those on Razer, but definitely better than the G400. The only qualm I had is that -- perhaps due to the shortness of the mouse -- the scroll wheel feels a little far back, and scrolling down requires a tiny bit more reach than I am used to. The side buttons are well placed and have a nice click to them. They do have a slight bit of give that makes them feel somewhat cheap. However, the main buttons are excellent and must be felt to be believed -- they have a very light touch and very low travel, which makes them amazing for quick tap-fire. The mousefeet are also quite nice, and the glide is smoother than many more expensive mice I've used. My only real complaint about the Xornet's build is its cable. It's a flexible non-braided cable -- which is nice -- but it is quite thick and heavy, making it drag on the mouse if you have too much of it hanging. Leave most of its length on your desk or use cable management and it shouldn't be an issue.

Sensor: Nothing to talk about here. Perfect, accurate tracking that I couldn't get to malfunction on my Puretrak coL in Enotus mousetest, even at 5 m/s. (For reference, I might use 3 m/s on my very fastest swipes.) Lift-off distance feels slightly high, maybe around 2-3 mm but not enough to notice in normal use. (Note that this is after the v75 firmware that fixes LOD). There's no acceleration, jitter, angle snapping or prediction.

Software: There is none! The Xornet is entirely plug and play, and sensitivity switches beneath the mousewheel allow you to select 500, 1000 or 2000 cpi. As someone who's used to 400cpi I had to adjust my in-game sensitivities to get this to match my previous settings. None of the mouse buttons can be rebound, which may be an issue if playing games that don't recognize scrolls, mouse3, mouse4 or mouse5 (ugh BF3). This wasn't a big issue for me, though I would have preferred the ability to set my own sensitivity. You also have to download firmware manually.

TL;DR: The Xornet is a great little mouse with a flawless optical sensor and build quality far surpassing its $30 price point. It's not a perfect mouse, and I may have rated it 4/5 if it weren't so cheap compared to the average in the overpriced gaming mouse market. It's light on features and its shape may not appeal to everyone -- especially those with larger hands -- but if neither of those bother you it's hard to go wrong with this mouse.
3728242
As someone who has been looking for a high-end gaming mouse for a reasonable price, this was a great buy. The customization factor is wonderful. I love the fact that you can change the color of the scroll wheel, logo, and the side buttons. I noticed that when choosing pink/purple colors, the scroll wheel takes on a slightly more pinkish hue than the buttons and logo. This also happens when choosing light blue colors; the scroll wheel is more of a sea green. This is not enough to detract a star, but is worth noting. Additionally, you can customize the brightness of the LEDs, set them to "breathe," and change the breathing speed.

The mouse comes pre-assembled with all eight weights inside. It feels heavy enough for me with all the weights installed, but this is a great way to customize the weight for those who prefer lighter mice.

I found the software fairly easy to understand and use. You can choose from five different profiles, each with different settings for the buttons, DPI, and LEDs. All mouse buttons are fully customizable to perform many different functions, for example:

Change between profiles
Press any key on the keyboard
Execute macros set up in a built-in macro editor
Perform basic PC functions such as copy/paste, select all, and print
Perform advanced functions such as switch window, run, and lock PC
Perform media functions such as pause, next track, volume, and mute microphone
DPI Settings

There is also a DPI screen in the software that allows you to adjust each of the five DPI settings to your liking, anywhere from 1000 to 16400.

The mouse has nice, rough texture that allows for excellent grip. It also came with extra cushion pads for the bottom, I assume for just in case the others get worn out. I have small hands, but most of the buttons are easy to reach. The 10, 11, and 12 buttons on the side are not easy for me, but I don't think I'll plan on using them anyway. Those with average sized hands should have no trouble accessing those buttons.

I honestly can't say enough good things about this mouse. It is easily as good as other name brand gaming mice with similar functionality, going for twice as much or more. The only thing I can't rate is how long it will last. I will update this review if I encounter any issues with that.
635593
I bought the Logitech MX 518 to replace an aging, but still used and very good working, black Microsoft 3-button optical mouse.  I bought it for gaming pure and simple, but ALL things on a PC are better to do with one of these.  This mouse has immensely improved my gaming in Supreme Commander and other very click happy games.  I really don't know how you could be a success without a mouse like this actually in real-time strategy games.

I did not use the software, have Windows XP and do not intend to use the software from Logitech.  The buttons for the thumb seem to default in IE (Internet Explorer) to the forward and backward buttons, don't know and don't care, at least for right now, how they operate in other browsers.

After getting used to the speed increase this mouse provides everyone else here using the MX 518 believes that this mouse is a good buy.  The MX 518 is useful to have in every general PC business application.

As is the mouse is hands-down better than any other for the price/performance in the market past and present.  Better deal than almost any other piece of hardware on the market for a PC, maybe even a Mac if you still have one of those.
4423848
I received this mouse with my Precision T5500 workstation. It is a great mouse, especially when you consider the price. It has an adjustment button that has 4 settings of tracking sensitivity. Laser tracking is so much more precise and reliable than optical tracking. Installs on Windows 7 (and 8 I'd assume) with no additional drivers. I haven't found another mouse that you can buy for this price that has laser tracking and a sensitivity adjustment button. I have one at work for CAD and I bought one for home use and gaming. If you are looking for the best mouse you can get for $20, buy this you won't be disappointed.
4719479
I know that a mouse isn't really something you can "love," but this is the case with this thing. It's the absolute best in just about every category.
1940886
Best Mouse available. Period.
I bought two because I love it so much.
The mouse runs wireless for 10 hours plus of hard gaming with high dpi settings, and longer if you aren't gaming or using high settings.
The input switches to corded mode when the mouse is plugged in so the mouse charges faster.

It has 8 programmable buttons (not counting mouse wheel) 7 of which are very easy to press without moving your hand at all. The button behind the scroll wheel is harder to press, but it is bound by default to allow you to switch between the profiles saved on the mouse (yes the profiles are saved to the mouse itself).

Logitech makes the best mice and this is definitely one of their best options. The materials the mouse is made with look and feel amazing while also adding durability, and the ergonomics of the mouse are very good.

If you want a gaming mouse that can also be used for work this is the best option.

On a side note if you are not impressed by the number of buttons this mouse has don't be deterred. The buttons don't get in the way, and the longer you use the mouse you'll find yourself using the buttons more and more because they are placed in such a manner that its very natural to use them. I don't even have trouble finding the extra buttons when I'm playing an intense game because they are set at angles and shaped in a way that it would be difficult to mistakenly press a wrong button.

Get this mouse. It doesn't get any better.
3566459
There's not much to say about this mouse that hasn't been said already.  Simply put, it's the best mouse ever made.

Awesome features:

For starters, you can customize everything about this mouse.  From the weight, to the grip size, to the LED color, you can change it.  No longer do you need to settle for a mouse that's too big, too small, too heavy, or two light.  You can set the G9 exactly how you want it.

It's also got some amazing tracking.  3200 dpi is insane for a mouse.  It's fast, it's precise, and there's no lag.  What more could you want?

It's got all of the buttons you could want and then some.  Your back and forth thumb buttons are there, and personally i find these indispensable when browsing the web.  The precision scroll wheel is a nice touch as well, and rocks to use.

Possible concerns:

Even though it's the best mouse ever made, it's still  not for everyone.

First, it's a corded mouse.  Corded means faster, there is simply always some kind of lag with a wireless mouse.  However, some people simply don't want that cord there, so keep that in mind.

Second, logitech's software continues to suck.  It's never been great, but the good news is you don't have to install it.  You still get all the basic features of the mouse without the software, but for some of the advanced stuff you're going to have to grit your teeth and install setpoint.

Finally, it's not great for lefties.  Sorry guys, the mouse world continues to discriminate against you.
1144730
If you are looking for an awesome mouse you won't be disappointed with this one. There is a reason why this one is so highly rated and you hear about so often. My brief review is below. If you want a full review for this mouse you can check out my YouTube review of it by typing this into the search bar ( Logitech G502 Proteus Spectrum Review Indelible Gaming)

Pros:
Extremely comfortable for right handed people.
Left and right click feel solid.
11 programable buttons.
Able to customize weights (121 g  139 g) (18 g difference between 5 3.6g weights)
RGB lighting is accurate and bright.
The scroll wheel feels get.
Glides very smoothing across my mouse pad.
The PMW3366 with Delta Zero optical sensor is AMAZING.
DPI from 200  12,000 DPI and able to up DPI in increments of 50.

Cons:
Mouse wheel can feel to firm and stiff. Also, slightly stiff.
Its a heavy mouse. Especially for FPS.
Limited software control over RGB lighting. Cant make LED 2 different colors at the same time.
Also with software cannot open a program.
Sniper button is too far way to press easily.
A lot of people don't like where the DPI up and down default button is located on left of left click.
Only comes with 3 profile settings and is some delay when switching.
4421842
The MX510 is a great mouse for gamers and normal PC users.  Fit fit for me was great and after egttign attuned to the mouse I woulg never go back to the other very good Logitech cordless mouse I had been using.  That took three days or so of regular use as my muscle memory got used to the new buttons and having a corded mouse again.

The control and feel of the MX510 is good and it really does make a difference in games.  The buttons are well placed and all are very useful (page back, page forward, change window, scroll up, scroll down, etc.).  It is well cbuilt and the rubber surface along the edges really makes for a good feel while the pearlized buttons and top look nice (I chose the blue, but the red is swank also).  The fact that it is IR as opposed to a ball makes this a perfect replacement if you have not made this leap yet.

For sub 30 dollars this mouse is well worth the price.  It would have been nice if it were cordless as it has a much better feel than the models higher up in this line that are.  Of course there are no batteries or charging to worry about either.

Buy it and don;t look back.
3530281
The just of this review is in the title itself...I bought this mouse to replace my Logitech MX310, which was a nice mouse but just too small and not ergonomic enough. I mainly wanted to get the Microsoft mouse because of it's smooth scrolling wheel with side tilt. That is the most wonderful part of this mouse!

The middle scroll button however, is very difficult to press down, you really have to exude effort to press it. I am hoping over time, the button will become looser and easier to press.

The shape of the mouse, the ergonomics of it, are superb; it really does fit your hand and fingers well. The mouse also has 2 rubberized sides which help you grip and slide the mouse easily across the table or mousepad.

The wireless function was incredibly easy to install following the instructions given and the CDrom. The software that comes with this mouse is also very customizable and even lets you adjust the speed of both scrolling, up/down and side2side.

Another main reason I bought the Intellimouse Explorer with Tilt is because it does have 5 buttons - 2 for the thumb area. The default setting is forward/backward for browsing the internet but you can customize that. The buttons are easy to press, but the placement of the buttons would have been better if it was under the thumb instead of up and over the thumb area, making it a bit of a stretch/effort to reach and press. The front button should also be larger and moved back, then the mouse would be almost perfect!

I'm quite a picky person when using the mouse because it's the most used computer hardware besides the keyboard and CPU! You have to really invest time into a mouse because your hands will need comfort for hours on end...this mouse doesn't disappoint. It's a great choice overall.

If you are lucky enough to find the other colors available besides the popular grey/black mouse, go for it! I have the red and it's beautiful.
4142039
I would buy again and again. I recommended to my gamer friends as soon as i tried it. I have a medium-to-big hand, and the simple wireless mice that one can buy are not great on my wrist and hand but this one feels amazing. It looks really sweet.

The features are great: Customizing it is really, really easy. You can change the blinking colors, speed, and you can create different profiles. The weights give you the resistance you need, and you can modify the weight rather quickly as well by adding or removing weight.
212783
I pined after this mouse for a good month before buckling down and buying it. At first, I was worried, but then I realized this thing was AWESOME. The feel of the mouse was perfect for my hand size, and it handles amazingly smooth. The adjustable on-the-go dpi buttons made games like Mass Effect 3 an even more active experience, turning up my dpi for aiming, then slowing it for shooting. Other games like Starcraft and WoW also benefit from on-the-go changes in preference. The light up still gets me every time as one of the coolest things ever. All in all, get this mouse. Its even cheaper than when I bought it...