X-Men First Class has as a great plot, great characters, and exciting action that keeps the movie going. It diverges just enough from the first three movies to keep it new, but also remains true to the X-Men franchise. I think they could have done a little more with the progression of characters like Mystique, but the movie found interesting ways to tie-in with the story lines of the other X-Men movies. This is definitely how the X-Men movie franchise should have started! Go see it!
This movie has a very complex and intricate story line. You must pay close attention to all details or you will be lost. Dreams and the subconscious are always fascinating subjects especially when it comes to movie making. This is not a mind numbing movie. Every scene is significant and will challenge you to think. I loved the movie and would see it again.