IGN pretty much hates it. They gave it a 5/10 and said that Midnight Club LA is way better. Normally I would buy it anyways to see for myself, but after the pathetic attempt at a game that was Pro Street, I'm definitely not buying this one.
Rent it maybe?
There's been a lot of mixed reception, I honestly don't think you should bank your opinion on one person's opinion and previous experience. If you do that, then you're ignoring the fact that this series has a successful legacy, and that although they took a bad turn with ProStreet, who's to say they haven't switched?
A grumpy critic hates it at IGN. So ****ing what? They care about statistical and technical care, not enjoyment, which is what a game's all about. On that front, gamers all over the net have been praising Undercover. THAT's something you can bank on.