I hear this is considered the date movie of the summer. I can see why, as it's quite romantic. However, I went on Dan's recommendation, and not on a date, but with friends.
I think everyone enjoyed it. It was similar to the Princess Bride in that a boy goes on a quest to prove his love for the woman he loves, there are lots of silly personages (among them Robert DeNiro and Ricky Gervais), and magic. But the story is not as irreverent as The Princess Bride, the special effects are believably beautiful and the photography is excellent. It is a nice bit of escapist fantasy that doesn't take itself too seriously, but is overall a pretty good balance of whimsy.