I've had no problems whatsoever with my MX700 - in fact, I was amazed by how smooth and responsive it was when I had my old CRT monitor at 100+Hz. I find it hard to believe that anything could even be smoother or more responsive than mine, although it's certainly up for debate. FWIW, I'm one of those semi-anal people who gets bothered by ghosting in LCD monitors, or at least can notice it - when most people say that they don't see any. (Current monitor is actually a 2005FPW - I decided its benefits outweighed its disadvantages). So I'm assuming that if these wireless mice really were noticeably inferior to their corded counterparts - that I'd notice it.
With that said, others are correct that a corded mouse will be lighter, and you won't have to deal with the charger (although to be fair, I just put my mouse back on the base whenever I leave the computer, and I've never had a problem except for some extended gaming sessions of more than 8-12 continuous hours

). My brother uses an MX700 for regular tasks and switches to an old Logitech Dual Optical mouse for gaming, because I believe the weight of the MX700 bothers him. So it's definitely not for everyone, but it's definitely not bad either IMO.