I completely agree with the com Jean-charles Perquin "jcperquin" this mouse is almost perfect anyway but at this price you can not compete (I got a 19) Never again for a long time I was waiting to be able to have the same mouse I had before the G500 which is for me the best mouse in the world and mice I had a sacred packet being Gamer (now much less) but the G500 was by far the best, the strongest and most effective mouse I've had, but it's over the G500 does not exist anymore, so I wanted a mouse has a low price that s' in the closest thing because I do not play much, I'm a casual player now and this is the one, this mouse is virtually a clone of the G500. Now go to the test: Advantage: 1- mouse responds perfectly. 2- whatever people say it is very comfortable. 3- disengagement of the roller thereby pressing a button and not on itself. 4- very important point it is very light thus avoiding the wrist tendonitis ... morfler, too many players farts with ultra heavy mouse just because they have nice colors, nice knowing that more stupidity mouse is light that answers more quickly and less we risk future pain. drawbacks: For games it can not resolve dpi but personally it does absolutely nothing for no one uses it anyway, and then a mouse is like a gun, if you do not know how to use it can have the best gun in the world is not make a carton.mais this mouse is not really made to play because its small flaws become annoying in the long run I think for the big gamer, the click of the roulette is not frank enough for games it tends to engage the left click of the roulette if there's nothing else to say, of course you are a true gamer buy another mouse, but if you are a casual player who is not stuck in PC all day you can go there with closed eyes.