Yes, I bought this bike last September... After what seemed like a million stupid little issues, I finally got my GSXR running the way it should a few days ago. Today was a beautiful 80 degree day, so I went on a 90-ish mile ride and here's what I've found so far-
It really starts to pull around 6-7k rpm. Up until then it doesn't feel too much different from my FZR 600, but once the torque starts to come in it's a rocket all the way to redline (13k). There were a couple times it felt like it wanted to pull the front wheel up, and that wasn't even at full throttle. Aside from a friend's ZX9R race bike, this is probably the fastest vehicle I've ever driven, and that's including Hellcats, Mclarens, Lambos, etc...
Even though it's a physically larger bike than the FZR, it weighs a bit less and it feels like I could never get close to its limits. I haven't replaced the tires since I bought it and they aren't great to begin with, but the handling is super sharp. I can't wait to see what it's like on some good tires and a decent road.
It's surprisingly comfortable, for a sportbike. The seat is much nicer than my Yamaha, and the riding position isn't too bad. I adjusted the shift lever position and the clutch grab point halfway through my ride and that made shifting quickly a lot easier.
It's LOUD. It's got a D&D muffler and after half an hour or so I had to close my helmet visor because it was starting to give me a headache. I might track down a stock pipe, or just wear earplugs. It also sounds completely different from my FZR. The best way I can describe it is the FZR wails and the GSXR roars. Not sure why that is, but I personally like the FZR sound better.
It's geared surprisingly short. I can easily cruise at 40 in 6th gear, which I found myself doing often, to prevent the exhaust from droning too much.
All in all, it's an awesome bike. A blue and white GSXR 750 was my dream bike growing up, and every time I looked down at the bright blue tank while I was riding this afternoon I would smile. I'm also really happy that I finally got it dialed in, there was a time when I was pretty close to giving up on it altogether. It still needs some minor work, but nothing that will prevent me from enjoying it all summer.
In a few weeks it'll be joined by something similar but very different... Keep an eye out for a comparison between the two.