I have quite a selection of gaming mice from Logitech, Razer, and even a new addition from SteelSeries Sensei Laser Gaming Mouse (Grey). So the Logitech G9x series has plenty of competition; including from other cheaper gaming mice from their own arsenal. They have the G5x series which are very capable on their own. Not to mention the normally cheaper and virtually identical non-MW3 G9x Gaming Mouse. The only difference is that MW3 edition has 2 interchangeable covers and it includes a nifty MW3 mouse pad. One cover offers a smooth finish while the other has a rougher texture/grip to it. Everything else is the same. So unless you absolutely need to have the MW3 Edition or it's about the same price, I'd go with the normal G9x.
I'm going to use the SteelSeries Sensei noted above as the main comparison as this was the Gaming mouse I was using before, and was previously the best at the time. I also have a separate review for that mouse. While most of my Gaming as of late has been with BF3, you can expect the same experience from other FPS games, including MW3. And now onto the review of the G9x itself and how it compares to everybody else.
The first thing you will notice is that the mouse itself is shorter than most. So the back of your hand will rest on the mouse pad. If that's a problem for you, I'd consider a wrist rest. So far, I haven't had any problems with fatigue after extended gaming sessions. There are two thumb buttons on the left, two primary left/right click buttons, a scroll wheel (also a button), and the two separate DPI +/- buttons. There are also 3 LED's to indicate what DPI you have it set at (more on this later). All of the buttons are within perfect reach, are easy to use, and there aren't annoying buttons on the right as with the Sensei. The only slight negative is the harder than expected button press of the scroll wheel, which takes more effort than I would like. Fortunately, I don't use it for anything with BF3. In either case, everything is programmable (more on that later).
The movement itself is very smooth, in particular with the included mouse pad. Which is obviously very important with a Gaming mouse. One feature Logitech has had in their Gaming mice for a while now is the ability to adjust the weight. At first, this seems like an unnecessary feature. I mean, what am I supposed to with that tin box and all of those tiny weights? But if you're particular about how the mouse feels, this can be the extra touch to give you the perfect mouse experience. I've used this in the past with older Logitech Gaming mice. It gives you the option of having a light mouse, heavy, or anywhere in-between.
Programming the mouse is very easy via the Logitech SetPoint Software. I say this all the time, but always download the latest software from the manufactures website. The included CD's should rarely ever come out of the packaging unless there is licensed software that has to be installed from the disc. Which isn't the case here. The software itself has all of the basic and advanced functions that you will ever need in a Gaming mouse. While the Sensai does have more technical features, I did find them ultimately overkill and something that 99.9% of users will never touch. Even with the noticeably fewer adjustments of the G9x, there are still plenty most will find no need to adjust.
I created a few profiles, tweaked the 4 DPI settings a bit, adjusted the LED colors for DPI (which can also indicate your profile), created a Macro or two, and off you go! I should also note that while there are 3 LED bars, you can have 4 separate DPI profiles that you can switch between while in game. In setting #4, the right 2 LED's light up. All of the settings are stored via internal memory on your mouse. So if you move to another system or format/reinstall, the settings will stay with the mouse. Some of the features may take a few minutes to get used to as they are still more advanced than anything you'll find with your average off-the-shelf mouse. But once everything is configured, you should have one less excuse for why you keep getting slaughtered in the latest FPS. :)
Pros: * Very comfortable to use * All the software adjustments a Gamer could want. * Great button placement and ergonomics * High DPI and extremely accurate * Seperate DPI +/- buttons * Adjustable weight system * Internal memory
Cons: * Stiff scroll wheel button * Short mouse design may be an issue for some * Bit pricey for MW3 Edition
Overall, considering how minor the Cons are, I consider this mouse highly recommended. It has now become my first choice for a gaming mouse. While I do like the MW3 grips and mouse pad, I would lean towards the normal G9x mouse if it can be found cheap enough.