Good Gaming mouse NO manual or quick start up guide
585069
I like this mouse and would rate it higher BUT beware there is no
Manual of any sort and when you go online to their website and find the manual your happiness becomes frustration as their "manual" is a digital photo of the outside of the box which has
NO manual and NO quick start up guide..
You are on your own here and at over $50
That's a shame
2227958
Served me well until I upgraded. A good budget mouse
1562667
This is a pretty good mouse.  I've had a similar Kensington product, a previous edition of the Expert Mouse, which lasted me for years.  When Apple's Leopard and Snow Leopard operating system stopped supporting the Mouseworks software and Kensington no longer updated the software,the older Expert Mouse became a mouse with a rollerball and only the ability to right click and left click.  I was without the buttons on programable buttons of the Expert Mouse that allowed the user to one-click applications and key strokes.

PROS:
-I don't know about this mouse, but my previous experience with a Kensington product was that it lasted a very long time.  It was a gift, and I can't remember how long it lasted.  6 or more years.  Maybe this one will last a long time too since it's the same brand.
-This newer product comes with a small pad that fits to the rear of the roller ball.  The pad can be attached or not used at all.  If the pad makes mousing more comfortable for the user, it's there.
-It has a wheel around the trackball that is used for scrolling up and down a page that works good.
-It seems to be sturdy in construction, and the design has a non-intrusive look to it without glaring trademarks or logos.
-It's compatible for Mac or PC.  It installed OK with my iMac Snow Leopard OS X.
-This is the best price that I could find.  Some customers believe that price should not be mentioned in a product review. If you are one of those customers, don't read this paragraph.

CONS:
-There is no real user manual or online tutorial.  The online user manual tells you how to download/install the program and that you should be a good ergonomic user of the product.  It tells you to see a doctor if you get repetitive stress symptoms.  CYA is what that's called, not RUS (Real Usable Support). When I clicked on the tutorials at the Kensington website, all I could get is tutorials for a security lock for laptops.

I think most of us can figure the mouse out, but I don't think a user should have to figure a device out.  I've gotten so used to gizmos being fully ready and documented right out of the box, I was surprised that the only substantial document in this box was the warranty in about 8 languages.  We all read the warranty stuff in Farsi don't we?  That little book is going on my bedside table for future pleasure reading.  Maybe Amazon sells a hardcover version.

What I figured out and you could figure out too but shouldn't have to figure out:  There are four big clicker "pads" arranged around the roller ball.  The lower left pad is locked in to being used as left click, but the user can program the other 3 to suit the user preferences - applications, websites, key strokes, etc.  I figured out that there are two more options for user-programmable clicks - if you click the top two pads at the same time or the bottom two pads at the same time, you get additional choices for programmable clicks.

-When I read the advertisement for this thing, it appeared to say that there were more than two buttons across the top of the mouse for those programmable clicks.  I couldn't see these additional buttons, but I figured they were there but couldn't see them in the illustration.  There aren't more than 2 buttons at the top of the mouse.  This may be a "con" on the part of the copy writer of the description or a "con" on my part.

FOUR STARS, NOT FIVE:  I like this mouse, and I'll certainly keep it.  As noted above, the lack of instructional support, for this less than tech savvy person (me), dropped it a star.  Is this lack an indication of the level of online or phone support/customer service by Kensington?  I hope I never have to find out.
1946475
This mouse is pretty good, all of it's features are pretty decent, the downside I found is that it doesn't let you customize specific actions for the buttons for specicic apps like the Microsoft Intellimouse. The switch-window button is not that useful either,it's placed in a very uncomfortable place and if you've working with computers for as long as I have there is definitely no replacement to the good old Alt+Tab combo on your keyboard. It does feel pretty nice in your hand though.

All in all if you really need to change your mouse this is definitely the one to get, it's mid-range price makes it good enough for all those games.
3414924
This review is for the D-16 model. The website mentioned in the product's manual (...) contains no mouse software, or at least I couldn't find any. I used a third party app to assign functions to the extra buttons. The cursor movement is accurate enough, though, and the buttons click easily (including the wheel button), even if they are a little loud. The mouse wheel is not very smooth, but it works. I don't think the speed adjustment button (below the mouse wheel) can be reassigned. As I think someone else mentioned, it can't be manually turned off (it automatically hibernates after a certain period of inactivity).
3919457
I liked my previous logitech remote and this one is alright, but the SW to manage changes is difficult to navigate for an average user.
I will likely replace it with a different universal sometime soon. Additionally, I purchased it as new, but it came without the CD or User manual. Amazon was quick to give me a discount equal to a used unit price and I went to the Logitech website to download the SW. Amazon's quick action and the ease of loading the SW the first time, were the most positive experiences I had with this purchase.
3445423
Came from using a Logitech G300 that was years old and getting crusty and so far this has been a good mouse but took a little time to get used to since the G300 had less buttons and was a bit smaller. I used to get the beginnings of carpal tunnel or something similar every few weeks of using a regular computer mouse, but with the way this is built I have yet to get it again. There's a good curve around the thumb and pinky area which is great for holding and move the mouse around. However the battery lasts a significantly shorter amount of time than I thought it would, and I am talking about for the gaming aspect, it lasts at best an hour and an half, if I am lucky, and then I have to use the cord.  This isn't too big of a problem as I am used to corded mouses but for people that mainly want a cordless and play for hours and hours, you might want something else.
4292171
Pros:
-This is an awesome mouse for games or MMOs with a lot of hot keys (FFXIV, WoW, Runescape). Not entirely necessary, but still helpful for games with slightly fewer buttons needed (Guildwars franchise).
-Mouse has a real beefy feel to it.
-Good feedback on all thumb buttons.

Cons:
-I had a defective right click key switch with symptoms such as the dreaded "double click issue" happening. Luckily, I've been inside of mice many a times and am familiar with taking the clicker spring off the key switch and resetting it, but it was annoying I had to do so. The anchoring end (opposite of where the click registers) was not straight and caused the spring to not fully rest after clicking all the time. This results in you hearing the click but it intermittently registering, many times multiple times per click sound. (-2 stars just for this)
-I knew what I was getting when I bought this, but I will reiterate the mouse is not the most comfortable for general use when you're not using the thumb pad. Some kind of plastic cover that could fold out of the mouse or slot over the buttons would have been awesome, just so you're not pressing the buttons. Even if you're on a profile that has the buttons effectively disabled, it still ever so slightly reduces the life of those buttons each time they're clicked.
-The plastic pads on the bottom of the mouse need to be removed to get access to the screws. While that's fine, when you put them back, they're slightly different than they are when you took them off. Combine this with a lot of necessity to go into the mouse (fix buttons, change weight (see below)) and eventually it's not going to glide very smoothly on mousepads. In general though, opening it is not advised unless you know what you're doing and are ready to void the warranty.

Other Thoughts:
-If you're going from a keyboard only hotkey situation to this, it takes quite a lot of time to get used to. You'll first start by having to remap everything (probably) and it helps a lot to change your hotbar shape to 3x4 for which ever hotbars will have things you're pressing on the mouse.
-I'm getting used to the weight, but it would be nice if it was easier to adjust. If the mouse is too heavy for you, you CAN open it and remove some of the lead weights inside. (With caveat of my 3rd con above).
4897398
This is a nice mouse for the price.  Let's take a look from the top and see if it is for you.

Packaging:  This is trivial, but so many of these plastic packaged products require a chainsaw to open.  That's not the case with this one.

Setup:  This model (and the V320) do not come with an installation CD with the Set Point software.  In order to utilize all of the features of the mouse, you need to download the software from Logitech's web site.  The file is just under 60 Mb so allow a few minutes for download.  The installation took about 10 minutes on my laptop.  Everything is straightforward, just make sure you allow about 20 minutes total.

Usage:  This mouse has some nice features.  The on/off switch is automatic based on whether the USB adapter is docked or not.  You can also turn it off manually.  Tracking is very precise, and it has a couple of extras on the scroll wheel.  If you push down on the scroll wheel, you get a magnifying glass and can then use the scroll wheel to zoom in and out.  The scroll wheel also tilts left and right for horizontal scrolling.  If you hover over the Logitech icon, you get a reading on the battery life in the mouse.  The only thing I would like to see different is for the mouse itself to be a little bit larger.  If you have larger hands, this may be an issue (consider the V320 instead).

Conclusion:  If you are only looking for a basic mouse, this should do the trick.  You will not find any added features for controlling media players or gaming.  If those are your needs, you should consider an alternative.
1152570
I have this mouse as well as the Logitech G700.  I personally think the free spinning wheel which Logitech uses is one of the most underrated features on a mouse.  I use it constantly, whether it is scrolling through a long document or zooming in and out quickly on a game, it is great.  The texture of the mouse is nice too.  It is a little rough on the sides for better grip (especially when your hands get a little sweaty).  The weight system is nice, but I don't really have much use for it.  As long as a mouse is not extremely light weight, I have not had a problem with any mouse I have previously had.  It does have a few programmable buttons which can be nice if you use them.

The cons for this mouse are first, the buttons for the mouse are very sensitive and I sometimes accidentally press them when I do not intend to.  In addition, the buttons on the side are very small and hard to use at times.  I wish they were much more pronounced like the buttons on the G600.  In addition, this is not much different than the previous G500.

If you are looking for a basic gaming mouse, i would recommend this one.  If you already have the G500, there probably is not a need to upgrade to this mouse.
2492688
I like computer mice. I've purchased over 6 high end gaming mice to play around with, most recently including the razer naga (good but overpriced), the logitech g9x (excellent. but middle mouse button requires too much force), and this mouse.

The expandable nature of the mouse was helpful for my large hands. I particularly liked how I could extend the left thumb rest so my hand didn't feel cramped. It's smooth to move and can be weighted to suit your playstyle.

Having said that, the software was terrible, the drivers were annoying, and the the middle mouse button press required too much force. This is an important note because if you play any game where weapon switching is involved then you'll know the frustration you feel when pressing the wheel accidentally makes it roll because you've had to use extra force.

There's a better mouse for a better price - the LUOM G10 Mouse, AKA the YCCTEAM 4000 DPI 10 Button Mouse - it's about 1/3 of the price, looks just as cool, controls even better, and if you don't care about taking apart a mouse and putting it back together again, then it will suit you perfectly rather than the RAT7. I recommend the LUOM G10 both as an entry and intermediate level gaming mouse so you can find out what you like without breaking the bank, and also get a lot of the "bells and whistles" that come with many gaming mice. The LUOM G10 also has pretty decent software if you're into macros and all that jazz.
1875743
Replacing the wired Microsoft trackball with the lights on it :(  So, this mouse works great and responds really well, but I cannot find the customizable mouse software for it. Not on the website (no links for it) and it did not come with a mini-CD or anything. Win-10 recognized it just fine. But I'd like to customize the other 3 buttons I have.
610517
I've used the Razer Naga which is the MMO version for Razer and they look almost identical. The feel is completely different and this is not such a switch over than I thought it would be.

You can only choose a 400, 1200, 2xxx, 3200 I think DPI with a button and I really like to use 800 on the Naga. I haven't found a way to programmatically change it and it makes it harder to do regular computer work. The side buttons feel good, they are curved to fit your thumb in a nice way but they aren't as easy to switch and glide your finger across as the Naga is.

Lastly, there's a button on the outside where your ring finger sits that you can hit to cut your DPI in half which I've had to disable because I can't hardly move the mouse without hitting it or just holding it down.

So if you are coming from another MMO mouse like the Naga, this is not a direct switch over. I am getting used to it but there's a few compromises I've had to give.

As a mouse in general it's well built, perfect weight, the buttons are solid. The right mouse button is very easy to touch and the left click barely has a click it's so easy. Other than that the mouse is great. I think it's a good mouse and the main reason I've given a 3 star is because I thought this would be a swap over from the Naga.
1622010
im a Wow player so im pretty much left or right clicking ALOT. I use the I use the right key to pivot or for direction control . it is already starting to feel like its gonna fail ,there is no way to check if there are any updates like ,if there is a profile setting etc.. the website and the packaging in the box is all in Oreintal language .other, than those lil slights its a pretty good mouse, oh and the mouse stays lighted all the time so be advised. it makes a good nitelite lol
2600986
I just contacted the manufacturer and now im waiting for a response.

can't change any mouse settings. any time i try to apply setting i get a message to 'plug in mouse'
tried multiple computers. windows 7,8,&10. different usb ports.
no idea why the software doesnt recognize the mouse is in fact plugged in.

but no point in having 16 buttons if i can't apply macros.

will edit review if it can be fixed. because  it is comfortable to use. one thing i forgot to check. but no middle mouse right/lift button.
if not will be returned
4645898
Pros:This is a great mouse for the money. It has 3 settings for dpi which is great for web browsing, gaming etc. Has two buttons on it that you can supposedly map although it does not come with a manual to tell you how.
I love the thumb grip. It really helps make it more ergonomic. It could be a bit wider for my taste but is still comfortable.

Cons: No manual or software for mapping buttons, the port on the back for the usb dongle is wobbly when inserted could be tighter fitting.
1008864
I've had this mouse for nearly a year now. Overall it's a good mouse for gaming but it has some shortcomings. A few are major. If you play shooters, DON'T buy this mouse. Get the USB version instead. I play a lot of Team Fortress 2 and the ability to choose different dpi levels helps between the different classes. However, at higher dpi the mouse response is somewhat shaky. I've been in situations where I have the mouse at either 2000 or 1600 dpi and sometimes it won't register my click or sometimes it will fire a click when I'm not even pressing the button.

I believe the mouse uses so much resource for the optical sensor that the clicks fall victim to a lack of bandwidth through the wireless signal. I'm not absolutely sure yet, but I believe other wireless signals have interrupted my mouse. Things like cordless home phones and other radio signal devices. If you play in tournaments where there are a lot of systems around, I would definitely go with a corded mouse. I wish I had gone with the Logitech G5 but cordless seemed more flexible. I recommend the G5.