It is not that bad. I saw it not too long ago. It's silly, to be sure, and the attempts at historicity are a bit more frowny-face inducing than necessary to tell the same story, but it's fun. It's not so-bad-it's-great fun, either, it's just kinda goofy adventure-y fun.

Besides which, I saw the Russel Crowe version, and next to that, Kevin Costner's is amazing.