MotoGP3 is a beautiful racer that, in my opinion, ranks right up there with Gran Turismo 3. The bike and rider models look fantastic. I was especially impressed with the amount of detail each featured, and the fact that the frame-rate never dropped - even with multiple bikes on the track. Weather effects also play a big role in not only making the game look pretty, but in the gameplay. Wet tracks give off a nice reflection effect, as well as vision hampering haze and water plumes. Sunny days come complete with lens flare and the occasional blinding glare. The only real downside I noticed was the less-than-stellar trackside objects, but when you're going 200 mph, you're not likely to notice.
Sound isn't nearly as impressive as graphics, but it does its job nicely. Rather than include licensed songs like a number of other racers, MotoGP3 includes a set of generic rock and techno tunes. I wasn't too impressed, but like I said - they do their job. Engine sounds are great, and many players will probably find it preferable to turn off the music and just listen to the engines.