We went to see this one because we thought the action would look cool in 3D. Overall the plot and action were pretty bland. I didn't know anything about this movie prior to watching it, so I didn't even realize that it was in multiple parts. Overall we were disappointed.
This movie had a great cast of characters and, as expected, tons of action. There were also a few funny scenes that got our whole theater to laugh.
A couple of friends mentioned that they were disappointed when Bruce Willis and the Govenator weren't really in the movie. WARNING: those guys are only in 1 scene. It doesn't hurt the movie, but you should know that they are bit players in this one.