I enjoyed it.
Felt more like a sci-fi movie than a comic book movie. The alien aspect of Superman has a heavy presence in the movie, and I liked that.
The final fight scene between Supes and Zod was pretty cool. It had a dragonball z type feel to it. But I did feel they packed a whole lot in the final quarter of the film, kinda like a Michael Bay film at times.
No Lex at all, but there were quite a few Lexcorp trucks in the background in some scenes which might suggest they're setting him up as the villain in the sequel.
Zod was a very good villain, I was just disappointed there was no "Kneel before Zod" line. Russell Crowe was great as Jor-El.
The flashbacks to Clark's early life worked really well. I was expecting a chronological storytelling of his origin and early life, but I enjoyed the flashbacks.
Overall, it was a good movie. Not Dark Knight standard, but it definitely made up for the crap that was Superman Returns.