It was only last night that I went to see this movie and I already want to go see it again. If you're a fan of the original you're going to love this one. I think one of the good things about this movie is that you don't have to see the original to enjoy it. It does help though, because in this one there is about zero character development. I didn't really mind it too much. Being a fan of the first movie and the comics before that I pretty much know all of the characters and their back story.
Which I think is something that Bryan Singer (the director) was counting on. He's already given you some character development in the first one... this time around it's purely about the X-Men showing off. Which they're very good at....and if that's not enough of a reason for you to go see the movie here are a few more.