I felt this was a decent movie. I loved how Magneto struggled with his hatred and his wanting to make things right. The positive influence always being his friend and soon to be rival, Charles Xavier. It really made Magneto a proper villain. He was bad, but as a result of his mistreatment by even worse people. It also gives his character a more detailed tragedy to make his position as a villain more understandable.
The action was pretty standard, but what makes this movie different from the rest in the series is a better understanding of why certain mutants chose to be who they are. The bad guys are also good in their own ways.
Best Xmen of the series. If you like superhero films, you should like this one.