Of course, they still get their asses stomped by 989 Studios and EA Sports, but it's a good start. Track details are nice, but an improvement that should be made is that there should be more interaction with the track details, ala the Road Rash series. The only downside to the graphics is the rendering of the bikes and the riders, but only because they are uninspired, not necessarily bad. The audio was a little underwhelming. The engines sound about as powerful as a 25 year old Yugo, and the sound effects of tires spraying dirt are sadly underdone.
Interface is interface.
Your bike seems to move on rails, with no experience of drag, skidding, etc, which are the things that would give the game a real racing feel. Even Road Rash 3D pulled that off. One other annoyance is that the Nitro blast doesn't really seem to speed you up, and it is unlimited. The only benefit is that if you crash on straight-aways, you can accelerate to top speed faster, but crashing on the straights is quite rare. Analogue support is included, which, as usual, makes the control that much more precise and accurate.