i saw Mission Impossible 5 tonight. it was ok. the writing is not good. way too many scenes are just the characters looking at each other meaningfully. and most of the dialog sounded ad libbed. the story was ok... but even the motorcycle scene was ho hum... MI2 was much, much better.
you won't be mad and want your money back. but 5 years from now you'll wonder if you saw it. and you won't remember anything from it.