I have had this mouse for over year, its a quality product with alot of features and regulary updated drivers fro new games/fixes.
I use it for gaming and have little to no problems at all the only thing it dont like is STEAM application games, but the control of speed and weight outweights the downside of STEAM.

I've had mine for a year, it still works great, though some of the paint is wearing off.

The texture is nice, easy to grip without being "Sticky".
The weights are a neat feature, the plus and minus buttons control sensitivity and are a feature I use constantly. The scroll wheel is the classic rubber nub that clicks when you scroll, not that free "Wheel" bullshit that's being used now.

In response to the previous reviewer: See that indention below the forward and back buttons? That's where your thumb goes. You shouldn't have a problem with the buttons unless you have Parkinson's Disease, in which case you probably suck at using any mouse. My hands are the size of a gorilla's and I don't have that problem.

I tried this out once when my regular logitech mouse died (cordless L7) and it was HORRIBLE. The stupid buttons on the side kept getting pushed regardless of what I did. I thought it was just me and that maybe my fingers were "too long" or something. Nothing doin..spouse and friend said the same. Too easy to accidentally click the side buttons. This will KILL you in a game like witcher or bioshock where you have a million things coming at you and you click the wrong button by accident.

I'm not a fan of logitech mice, i got one for work after only using MS mice. My supervisor made a big deal about about how good and great mouse i got was. The one huge annoyance was the inability to set the wheel down to be a double click. I've used a mouse with that for years, i found windows at times can be awkward when needing to double click on something, but setting the wheel down to be a dblclk i never have those troubles anymore... Unfortunately after installing the latest mouse driver, i found you can not set this on Logitech mice. Also one huge annoyance i remember entering this review, it was nearly impossible to find the correct mouse driver on the Logitech site.

I love this mouse so much that I own two of them!