This movie suffered due to the director, because the film overall lacked direction.
Now I am not saying this was a bad movie, the actors were wonderful, if lacking there was too many. Magneto was amazing throughout the film, though Halle Berry did 'over act' a bit much throughout. Another problem was the shortness that Cyclops and Professor X had onscreen. I know why Cyclops was cut short, but Professor X was killed off in a second. What is interesting is they never showed Cyclops being killed.
Pluses? Naked Human Mystique with nice dark hair ^_^ Magneto living, and proving that even with 4 cure needles stuck in him, the cure is only temporary. Iceman all iced up, finally, and the way it was done was well presented. Cyclops actually was presented well.
Minuses? Bad direction, it was all over the place x.x Little to no screen time for Rogue, Cyclops, and Professor X, they were totally ignored. Wolverine was an emo pussy craving Jean throughout the entire film, even though she said she picked Cyclops. Even though SHE SAID she picked Scott over him, he still whined and pined. I was so glad he killed her, but again that was probably a directors issue. Also there was alot of sex...
Best scene? The last one, showing a depowered Magneto, sitting all alone in the park playing chess with an open chair. The pieces are metal, and even though he took 4 shots of the depowering cure, yet he reaches out, and with his powers, slightly nudges it.

Bonus scene(s):
I didn't stick around because I heard it was a rumour, but apparently there are several bonus scenes. The only one I've seen stated by alot of people is Professor X living on in another mutant's body, a mutant that had no soul or somesuch. I've heard rumors about there being actually 4 scenes, depending on where you live depends on which one you will see at the end. I hope the Cyclops one is true, especially since the only thing the showed before he 'died' was a rouge sucking effect, which was not quite how she killed everyone else.