I found TT Superbikes at Best Buy for 10 bucks last week, and I've hated it ever since. The default view is behind and above the bike (Famine's "copter cam"), which I despise, but the other views are displayed as if from cameras, not a rider's eyes. In other words, every wobble of the bike, every bump, every shake aims the viewpoint left, right, up or down, which makes all the other views useless. I've heard people say that the sense of speed is better in TT Superbikes than Tourist Trophy, but I would submit that that's because you can't see far enough down the road in Superbikes to know what's coming up. It's like riding in fog.
I completed Challenge Mode Master Class 125 and 250, to Gold, and lost all patience with the game, used the cheats on Jester Interactive's forums to unlock everything so I could just ride and try different bikes.
The riding physics has some good points, my favorite item is the fact that engine revs increase in a hard lean (sidewall is lower radius than the full tire when upright) but I think it's exaggerated a little. Also, the wheelie/stoppie crap is just too much. Yes, I know about weight shift with the left stick, but there's too much of this one wheel in the air crap.
Mad Sunday is a hoot, though. (Racing on roads open to normal traffic.) After the unlock cheat, Mad Sunday by itself is worth my 10 bucks!
I should also say that the graphics aren't even close to TT/GT4 standards. Almost cartoony in comparison.