Customer Reviews
Guilty pleasure 
2008-06-27
High cost, but I have tried several other mice and I needed one that is a little shorter for my hand. This one is perfect for me. I love everything about it. Hope it holds up to daily use by several people in the family. mgn
Great for palm grip users, not so great for claw grip users 
2008-06-24
If you are a claw grip user like me, which means you hold and move your mouse with your fingers without moving your arm, then this mouse might not be for you. Claw users love the precision and speed that we can move the mouse in games versus the whole-arm movement of palm users. If I need extra pixel by pixel precision such as Photoshop work, then as a claw user I can place my thumb and right 2 fingers on the mouse pad and slowly guide the mouse around.
If you are a palm grip user, skip this review and buy this mouse!
I use the mouse for long periods of time each day in apps like Firefox, Photoshop, Crysis, Call of Duty 4, work and general usage. I have many Microsoft mouses including the wireless optical 5000 and the natural mouse. I bought this mouse for its gaming features but forgot that as a claw user, we aren't in the majority thus mouses are usually not designed for us specifically.
As I grip the mouse, I find that the rubber grip is horrible for my thumb because the only place you can place it is in the depressed area. The plasticky grip is a bit better because the thumb area is flatter and easier to hold. However, I cannot find a truly comfortable way to claw it even after hours of adopting to it in Crysis.
I am definitely in the minority when I say I like a flat or even slightly protruding round surface for my thumb to grip instead of a caved in area. If the above describes you, I recommend you skip this mouse and get the wireless optical 5000 mouse; you'll love it.
This mouse also does not contour to your hand's natural curve very well and forces you to turn your wrist counter-clockwise to accommodate its almost flat top, which I think is a step backwards. Ergonomically, this mouse rates below average.
See other better reviews about the features of this mouse, but one thing I love and wish was on other mouses is the wonderful feature to lower or increase the DPI with a physical button the mouse--on the fly. This proves invaluable in games: For example, when I am driving a tank in Crysis, I dial up the DPI to max so I can turn the turret faster; when I am zoomed in on the precision rifle, I dial it lower for pinpoint accuracy, all possible due to the button.
So far it's great 2008-06-23
I'm really starting to like this mouse. The control is EXCELLENT. It is very configurable. You can even change the mouse's LED color. The only possible issue is getting use to the shape. I use the computer almost all day and it seems if you don't hold it well then it may cause discomfort, but I am adapting to the design and think it will be great once I get use to it. If not then I'll update this review.
Great Movement but Bad Features 
2008-06-18
I bought this mouse to use with my Adobe programs because I wanted ultra precision. I had the wireless Logitech MX Revolution but getting in close with Photoshop it tended to "skip". The G9 Laser Mouse is exactly what I needed it is smooth and glides. The sensitivity is the best I've had, when zooming in I set the dpi lower and when surfing the internet or gaming I set it all the way up. And you can set three dpi settings so that you can get to them with a push of a button.
Now for the bad part. I had the Logitech MX Revolution and the features on that like automatic scroll wheel change from smooth to click was amazing. The G9 has you turn the mouse over and click a button to switch it making the feature almost useless, since turning over the mouse clicking the button and then scrolling takes longer than just using the scroll bar.
The number of buttons on the G9 is also underwhelming giving you a Back, Forward, Dpi Up, Dpi Down on top of the standard left click, right click, middle click buttons.
The comfort is better on the MX Revolution but the G9 is still soft and smooth and gives you options to change the case to a smaller "grippy" top for precision gaming. The option to add weights to give you the perfect feeling is also a good addition.
In the future if logitech releases a MX Revolution that is corded or has the G9 smoothness and DPI that will be the perfect mouse. As for the G9 it's a great precision mouse with not all the features you would like.
Ouch 2008-06-06
I recently upgraded my failing MX510 mouse. After reading so many positive reviews I decided to try the G9. The features and setup program are all fantastic. The mouse is great and very responsive. I loved the mouse untill I actually had to use it for more than a couple minutes and got even worse when I tried to game with it. This mouse is just to unergonomic. My wrist would get fatigued fast and start hurting after a short time. I tried for several days but it never got better and I never got used to it. I returned the G9 and got the G5 which uses the classic tried and true Logitech mouse shape and am not disappointed. It is a great mouse and I have no more pain in my wrist.
Good mouse, has 1 problem 
2008-07-20
The only problem I have with this mouse is the size and the hard textured cover for this mouse is also textured on the bottom section of the mouse. Since there is texture on the bottom of the cover, it slows the mouse movement down. A bit of sandpaper does take care of the problem though.
Too small 2008-07-19
The Bad:
It's too small for medium to large hands, unless you're a claw-gripper. The smooth default grip is nearly useless unless you are a child or have small hands --- it's too small to palm, and too slippery and "velvety" to claw. So you'd spend more time trying to hold onto the mouse than actually working or playing. Sadly, the smaller interchangeable grip is the grip of choice if you're a palm-gripper, when it was designed for claw-grippers. The center of your palm will never be supported, leaving a gap of air.
The thumb-buttons are set too far back, causing me to retract my thumb before I can hit the "back" button with my thumb joint. This simply won't do for gaming. If I place my hand further back to accommodate the thumb buttons, then my palm won't be supported by the mouse at all, which makes me have to claw the mouse with my fourth and pinky fingers.
The Good:
Scroll wheel "MicroGear" works like a charm for scrolling quickly and stopping precisely at the portion of the page you want. This feature, along with Logitech's great mouse feet, makes it a little difficult for me to ditch the mouse.
Conclusion:
Since I still have my MouseMan Optical Dual Sensor mouse (Logitech), I periodically compared the grip comfort between the two mice. There is really no contest... the old old MouseMan's chassis is by far superior to the G9, for large and medium hands. There is definite palm arch support with the latter (and I suspect with the G5 as well). Whereas my hand (or any of my buddies') can't climb on the G9 at all and rest on top of it.
Get the G9 if you are a clawer. For palmers, look elsewhere. I'll be returning this unit before it causes me joint damage.
Middle Mouse Button Requires Force 2008-07-17
In addition to all the other reviews, I'd just like to add that the middle mouse button is very difficult to press. It requires a ridiculous amount of force to push down. I died many times in various FPSs because I couldn't hit the middle quickly enough. Fortunately, this is fairly easy to fix: either change the middle mouse button to one of the secondary buttons using the downloadable software, or just change the key binds for any games you play. Other than that, this mouse is very good, and I'd recommend it to anyone who has the cash.
Awesome gaming mouse! A must buy! 2008-07-15
This mouse is absolutely awesome. I've always been a fan of Logitech mice, having had a G7 and G5. I was looking for a new mouse and tried some of the Razer mice. I didn't find them comfortable at all and after using them for several days, they still didn't cut it. So I decided to try the Logitech G9, and I'm so glad I did.
First this mouse is extremely comfortable. I could just pick this mouse up and start playing, and didn't lose any of my previous accuracy in FPS. Anyone who has gotten a new mouse knows that it usually feels weird when you first get a mouse. This mouse just felt right. There was no adjustment period, it was just perfectly shaped for your hand.
Also this mouse is great for customizability, you have two grips, adjustable weights, and the software is very robust and lets you create profiles for mouse sensitivities and even changing the color of the LED.
The tracking on this mouse is perfect, I've never had the mouse skip on me, and I usually play FPS games like CS, COD4 and TF2. The construction of the mouse is top notch, I've had it for several months without any sign of wear to the grip or the bottom of the mouse. All in all a fantastic mouse. Definitely a 5 star product.
Overpriced lousy mouse 2008-06-29
Being a fan of Logitech mx518, g5, and g7, I expected to like this newer g9 as well. Unfortunately I was quite disappointed. Both detachable hand grips are terrible. The first soft grip is designed so you have a move your whole arm for accurate movement. If you just use your fingers for mouse control like most other gamers, your grip on the mouse will slip occasionally. The second grip is designed for finger movements, but the actually feel is just awful. It feels like grinding your fingers against a sandpaper.
All the other feature felt like useless gimmicks to me. The features in G5 is more than I'll ever use so it's no surprise g9 is just pointless overkill. Is setpoint software seems buggy and takes time to load up well after the PC and Windows have loaded. The mouse does look quite ugly. Overall I feel Logitech's g5 and the optical mx518 are far better and comfortable to control than this mouse. G9 is so not worth the $99 MSRP price let alone the 40 bucks I paid for it.
