I saw Forbidden Kingdom about a week ago, and the best way to describe it is "meh."
The choreography was damn-well amazing, but the music was corny and was always too telling in "how you should feel" at every moment. Other than a poor plot reminiscent of A Kid in King Arthur's Court, it was alright, if only because Jackie Chan and Jet Li's acting made up for those major pitfalls slightly.
I would not suggest this movie to anyone over the age of 14.