Even though it rarely moves away from being a zombie plot and a zombie movie, it is undoubtedly a unique feature.
I don't have to tell anyone that the editing is perfection, the camerawork is great, and the jokes are funny, but I will anyway. All of those things are true. Edgar Wright is the master of all of those things.
I think the performances were pretty good, and the music definitely added a kick to the action, which was also great. Nice gore.
The writing is very good, and specifically very funny, even when the characters are faced with a few moral dilemmas.
All in all, a great movie that delivers on everything it should, and is a super fun watch, as well as being technically enthusiastic.