Been using the G700 for over a year now and i don't really like it.First of all, it's bulky.The shape of the mouse is just not meant for accurate mouse movements.Add to that the fact that it doesn't glide well on my SS 9HD, unlike the M90 which uses real nice low-friction feet.I have a Logitech g700 and it's working perfectly. I doubt i'm gonna switch it, unless i find a really better wireless gaming mouse..
Really? I play BF3 in weekends with some friends, and i had no problems until now. I switch weapons and accurate shots and response is great. Maybe you are just a bad player.
No offense, but if you are bad at games, it's your fault, not your hardware's.
I haven't used a Roccat yet, so i can't say anything about their mice, i just say i have a good wireless gaming mouse which gives me freedom from creepy wires (when it's charged, of course, +24 hours is good time for me, i don't play more than 5 hours a day), is very responsive, has good features, feels confortable to my hand and gives me extra button i found usefull in many games, like BF3, Diablo 3, Modern warfare and other games.