It was pretty good, but far from perfect. It has major pacing problems, and it is way too slow in parts, but otherwise it's a solid piece of kick-ass Supes action. It doesn't come near Avengers or TDK level, but it's nowhere near Green Lantern (lack of) quality either.
The character is a lot less dark and emo than I expected. And Zod is intimidating and commanding. Michael Shannon is great. It's my favorite Superman movie, but then again I dislike all the others, so it's kind of a moot point.