Obviously Shrek 1 was fantastic as it was new, shrek 2 was reasonably funnyish, shrek 3 was totally useless.
Shrek 4 however has gone back to more the original shrek, and is reasonably quite funny again. Someone has already given most of the movie plot away, so I shall not.
I had my funny bone removed years ago, did I enjoy this movie, yes I did, would I buy it at full price? Probaly not as it is not a movie that I would want to see at this price, budget title five stars.