I personally loved the movie, couldn't wait to see it and thought for an origin movie it was quite good; it held up to special effects magic shown, it held up to the story of the Fantastic Four, and I think that all the actors really brought to their characters to make them great and make them seem life like - or as real as movie characters can get anyways.
Julian did a great job playing Dr. Doom and he, as always, looked great so I know that kept me happy in a lot of cases; it's my opinion that the cast and production crews deserve their great $56 million openning day spot at #1, definitely one of those movies that could save summer they've been talking about around the web recently.
If you've got the time, go see it, you definitely will not be disappointed - trust me!