I think even more important than the bike quality itself is making sure that you know what you have. I wanted on of these bikes when was about 18 or 19 and already had about three or four years riding experience. Depending on your experience, I don't know that I'd make this your first sportbike. I'll put it this way, with now having about 13 or so years riding experience, I now have a ZX11 that scared the hell out of me the first time I opened the throttle thinking that I was "ready" for what was coming.
This bike will run of and leave you if you're not careful. If you're smart about it, take your time. Don't jump on it and go race the first victim you meet, because I've found that anyone who pulls up next to you is gonna want to see you get on it hard, and it will be hard not to, but then you'll make a fool of yourself when you slam the throttle and the front end comes up so fast and bucks you right off of it before you even get 50 feet. This bike will still beat 98% of the bikes out there, and they know it, but will try you anyway. Yes, even the new litre bikes are not necessarily going to beat it. As close as these things are now, the rider makes the difference.