Summary: I love this mouse when it works, unfortunately that window of opportunity isn't terribly long. I ordered my first mouse in November 2012. The right-click button stopped working in any reliable fashion. After jumping through hoops and raising all hell with Logitech, they finally honored the warranty and shipped a new one (October 2013). Now the buttons are failing again on the new version.
Summary: Got this mouse for mmo gaming, first thing I noticed is that this thing is ridiculously bulky. I have to reach with my thumb in order to click the first (g9, g10, g11) 3 keys on the side, and the mouse itself is very uncomfortable. You have to elevate your wrist above the base of the mouse in order to grip it properly and obviously that is not going to work for extended periods of time.
Summary: I have a MacBook Pro and been using the Razer Naga on it for a year. Switched to this one because of Logitech's excellent reputation. It worked okayish for about two days, before shutting down my USB ports each time it was plugged in. Online search revealed I wasn't the only one with the problem and the only solution was an externally powered USB port, which is a joke for a mouse. We then tried it on my boyfriend's Windows machine, which promptly froze up.
Summary: Purchased for MMO- went for logitech because of previous good experience with logitech products. However build quality is poor and configuration has some frustrating limitations that will obstruct how I want to use it (eq, middle button is button 2 not 3 and cannot be reconfigured like the other buttons). A waste of my money and I'm back to look for another mouse after 1 day.
Summary: The Mouse came as usual but when i opened it and tried to use it i noticed straight away the left click would not press down , I Expect a full refund !, Will order another one tho and hopefully it doesn't come broken , not happy at all !
Summary: The only problem I had at first with this mouse ( and it was a big one ) was how uncomfortable it was. The size of it is just far too wide and the G-shift key irritates the hell out of where you would place your pinky finger. The 12 side keys are amazing to use and are positioned perfectly.
Summary: I play LoL and Wow.... this mouse is great but it has a major bugg at the moment so i am taking it back and will most likely buy the naga. The bugg on this mouse happens when you are clicking rapidly like in lol and it will shove your camera off your character which in team fights will kil you straight away. amazing mouse but this bug makes it useless to me. DONT BUY look on the interent first as i am not the only one saying this.
Summary: So ich hatte jetzt zwei dieser Mäuse: Eine weisse G600 vom Juli 1013 bis Dez 1013 und eine schwarze G600 vom Dez 2013 bis gestern. Die Mäuse arbeiten super und waren zuverlässig bis mit einem Schlag bei beiden der Laser erstarb: Maus1: Bewegungen wurden schleichend über 3 Tage immer schwächer. Zuerst dachte ich es läge an der Oberfläche aber am dritten Tag ging auf keiner oberfläche etwas. Das Leuchten des Laser war auch nicht mehr wahr zu nehmen.