My first impressions of this game coming straight from playing SBK 07 on the PS2 was that the handling was a bit tame in comparison. But after playing this now and getting used to it and tweaking and testing all the settings I've found its much better than I previously thought.
My only real critisism of this; and many games have the same problem is that there aren't enough difficulty levels in racing games, and the ones they have usually jump up too far in difficulty, Amateur is too easy, I won it with about 250 points to spare over my closest rival, and Professional level too difficult for me to win a season with, I don't even get close, so you can see the huge gap there is in the levels, it would have been great if they had smaller margins between difficulties and more of them, then when a player improves they can step up to just the right amount, this problem won't be so for everyone, but if you do find yourself in the same position it can spoil it somewhat.
Graphics are nice, bike dashs are great, handling and ai are good, and its great fun to play online, and there's a demo on Xbox live marketplace if you want to check it out.
Incidentally the same makers of this game are releasing Moto GP 08 next month under the 'Capcom' publishing name , so expect that to be very similar, but of course with all the tracks and riders of the Moto GP season.