Best of the lot of them. Didn't think much of the others, but this one at last does the franchise some justice. Even if you're not a fan of the X-Men films, you should give this one a try, it's quite a bit different and a lot better I think - plus you don't have to have watched the others first, you can watch this one on it's own. In fact, the whole series might make more sense if you watch this one first.