Need For Speed should be about street racing, and cop chases, and a story to follow. This game has none of those. They tried to make a simulator, and the result is a disaster. The physics is weird, and it gets boring very quickly, because it's just doing the same thing again and again: enter more race events. There's nothing to look forward to.
Although it does have a large collection of very good cars, the best/coolest ones are all unusable, like the Veyron, or Mclaren F1, unless you use cheats.
The new NFS went back to the original storymode/underground racing idea, because EA themselves admitted that Pro Street is a huge failure. So I just ordered Undercover, and can't wait to see how it's like!