I was lucky enough to get 3 laps on a 2010 today at E Street. The low end throttle response in slow corners was very good. It was a noticable difference from my 08 YZ450F. The bike has about 4 hours on it so the suspension has not broken in yet, but in it current condition it felt pretty good. It turns better than my 08. The motor felt a little flat in the middle. Very nice bike.