Summary: I've owned this mouse for less than 2 years, and once again, it has stopped working. I've owned the Logitech G5, G7, and G500. I love the way they way these mice fit in my hand, but other than that, they are trash. I've gone thru replacements of each model. It is extremely frustrating when you go to use your mouse, and it just doesn't work. The common double click issue is always happening, until one day the left click doesn't work at all.
Summary: EDIT: 6/24/2013 -- 25 days after purchase. The G500 has started exhibiting strange behavior after less than 1 month of use. The mouse now sporadically sends left and right clicks to the computer without actually clicking the buttons. When clicking, the issue still occurs and is more severe (left and right click are switched occasionally, mouse click is released without you releasing the button, etc.).
Summary: This mouse arrived from Amazon on May 16th 2012, and after < 9 months it has become unusable due to button durability. At times I have enjoyed using it, so I will also try to include some things I liked about it. QUALITY & DURABILITY + I'm trying to think of something positive to say here... the DPI setting indicator lights still work? - Left mouse button. Quote from feature list: "Buttons (Left / Right): 8 million clicks". FAIL.
Summary: I like the shape and button placement, but after about 8 months the LMB started acting flaky and wouldn't hold items while dragging and dropping. At about 10 months Single click now acts like double click. I contacted support and came to the conclusion that this is caused by a bad switch. Overpriced judging by the pretty package on outside, but cheap Chinese materials inside.
Edit - Was a Great Gaming Mouse until it began to fail
18 September 2009
Summary: I previously used a G7, and loved the mouse. Now the G500 is amazing to me, the ability to program all of the button with macros is awesome for gaming. The scroll wheel pushes left or right, which are the best buttons I found for gaming, along with the lower DPI and back buttons, all right there under your fingers. The shape is very comfortable, the textured side is great.
Summary: Although the mouse looks and feels good, overall very poorly made, all components are so loose, mouse wheel feels awful and unstable, I can't even use the wheel for browsing online without it zipping me to the bottom of the page (?). The fact this is meant to be a 'gaming mouse' is just shocking, the only good gaming feature is the side buttons. Would never recommend to a gamer.
Summary: I don't understand why Logitech discontinued the G300. It was a FAR superior mouse, in terms of build quality. As for useability and functionality as a gaming mouse, the G300 had the buttons that all gamers want and was far more customizable. These are junk compared to the G300.
Summary: I have two of these. Absolutely perfect and comfortable to use, except that they keep disconnecting in a totally random way. It's a known problem which makes them useless for gaming and irritating for anything else. It's a shame as it's a very comfortable mouse to use.
Summary: I own a couple of these, as I thought it was great at the start. About a year in, the mouse will suffer frequent disconnects though! I have tried it in every USB port in multiple computers and it disconnect at least once per game (getting me killed). If you were only a casual user and will just be browsing the internet, then I'm sure it will be fine.