All right, so perhaps not the worst ever, but definitely the poorest I have seen this year.
The television show was all about fast cars, fast women, good music, good banter, bright colours, and smiles. The film had none of them. It was almost as if Michael Mann (who has no real excuse as he was involved with the series) had decided to make a film that was everything the show was not. He certainly succeeded in doing that, but failed to make a good movie in the process. Even Jamie Foxx and Colin Farrell (both good actors) couldn't pull this turkey out of the flames.
And what was with the moustache that Farrell was sporting?
Two hours I'll never get back. Avoid.