Graphics: 4.5/5 Very good graphics - but not the best on the console for racing games. GRID is newer, and just looks better. The rain effects in this game are also weird looking. Some people say they look fantastic, but I don't know what they're seeing - it looks like your car gets wrapped in saran wrap when it's covered in water.
Sound: 4/5 The soundtrack is fitting, interesting, and has a lot of variety. A good portion of the cars sound great, but then some others just sound unrealistic. I can't think of any in particular, but when you hear one, you'll know what I'm talking about.
Control: 4/5 As I'm sure you know by now, bikes are drivable this time around. Many fans thought this was a bad addition, and I find it hard to disagree. The bikes are pretty pointless, in my opinion. They drive a lot like the cars, and you also have to go about 50 MPH to fall off the bike. I know they did this for balance, but it is irritating when you hit a guy on a bike with your car and he doesn't fall off. So basically, the bikes and cars control pretty well, and the driving conditions (snow, rain) DO affect the way your car turns and whatnot, which is cool, the cars and bikes both just control too similarly.
Fun: 4/5 PGR 4 is the first PGR game I've played, and I find it pretty enjoyable. It's not the best racing game on the console, but it is still worth a try. There are a ton of cars, an online community that tracks stats, and a bunch of cool tracks. If you're looking for an entertaining, cheap racing game for the 360, buy PGR 4. Or, better yet, get the Messenger Gold Pack with, for $55 on Amazon.com, includes a 12-Month Gold card, a headset, a chat-pad, and of course, PGR 4.