I thouught it was the worst of the three. The new director really showed his lack of skill with a story. Lots of cool action yes, but far too much stuff that didn't really serve a purpose or support the story.
It almost isn't fair to compare the movies to the comics. The story has never followed the comics, or really had much of anything to do with them for that matter. All they really did is lift the concept and characters. Many of the relationships of the characters are wrong and nearly all of the characters are out of place relative to each other time wise. What happened to Nightcrawler? Where was Apocalypse? How come Beast didn't know the rest of his teammates? He's an ORIGINAL X-man... Angel was also an original X-man...
Entertaining popcorn movie? Yes. True to the series? Not by a long, long way.