I'll admit that I went in with low expectations, based on (1) prequels/sequels are rarely as good as the original and (2) the last X-Men movie, which I found boring.
This had action, explanations, hot looking guys <g>. The story is weak in places but, for me, that was offset by nekkid Hugh Jackman .
Overall, I'm glad I saw it and would recommend it to a friend.