I don't know anything about Formula 1, I'd never heard of Niki Lauda or James Hunt before seeing the trailer, but this movie made none of that matter. I just had a great time watching and learning to love both of the main characters. Ron Howard did an excellent job capturing the excitement of F1.
I read this book—yup, I went there—many years ago, at least a couple of times and I loved it every time. I watched the movie once, and now I'm questioning whether or not I was even right to have enjoyed the book so much. It was that kind of movie. It had some nice set pieces and a few decent moments, so if you haven't read the book, maybe it won't suck for you.