"Need For Speed" is several different movies at once, and most of them are very stupid.
There is a rumor that George Gatins wrote the script for this film, but I find that hard to believe after sitting through the film. Sure, there are some people and there are some things that happen to them, but the only real reason the studio gave director Scott Waugh cameras was so he could film some admittedly amazing car stunt sequences.
Waugh earns his action credibility honestly. He comes from a family of stunt performers, and he's been doing stunts in film since the early '90s himself. When he says that he wanted to make an ode to the great stunt driving movies like "Bullitt" or "The Blues Brothers" or "Smokey and the Bandit," I take him at his word. There are some very well-shot and well-staged car scenes in the film, and if all you want is to see car mayhem that was shot for real without CG, then go see "Need For Speed." You'll feel like you got your money's worth.