Great free-roaming mode, great online play, just a shame about the choice of cars.
Graphics - Its got amazing graphics, especially when making use of the 360's HD capabilities, meaning you can soak up the sun, and admire the cars, and scenery. You get a good range of views, meaning whatever takes your fancy, you got it, chase view, bumper view, and one thats a fav with quite a few people, in car view, where its literally, in the driver's seat, complete with animated arms.
Sound - The cars sound great, especially if you sit in the showroom revving one that you don't actually own, hehe. Not only that, but they sound great when you're out cruising the streets, or in a race, the cars each keep their distinct tones.
Online - Wow, is the only way to describe it, players online at all times, always willing for a bit of fun, and maybe a chat. And what makes it so great is, that you dont have to go and enter races together, you can just cruise round, in a convoy.
Racing - The A.I. seems pretty smart, however, could also be improved, as i've seen it on numerous occasions, make the same mistake in a corner, meaning it careers off the road. However, opponent cars regularly seem matched well to your own car, making for a good race each time.
Choice of vehicle - Unfortunately, this is one of the areas im not so keen on, agreed, there's a great range of exotic machines,Audis to Mercedes's, to Aston Martin, to Saleen. Howecer, personally, I prefer a range of vehicles, including the tuners etc, so that if I fancy a change, I can choose a different car, and take a break from the norm.
Overall - A great game, with stunning visuals and sounds, exciting racing (its what the game's about after all), a great online community, and a great choice of exotic vehicles.