Maybe I'm spoilt by the likes of Spiderman and the recent (and very good) Batman. But the X-Men were always my favourites as they had a group and an impossible fight. This movie doesn't, to me, bring that across quite as well as the cartoon did (yeah, a cartoon!).
By all means go see it - most of you probably already have. I could use lots of words ending in 'fest', believe me. It's a 7/10.