You know, I'm going to say Excellent. I actually liked the zombie bit and it led to some decent fighting scenes (unlike Doomsday) like with Tess and the sword and Lois knocking Clark through the window.
Character development and storyline front was good too. Clark/Lois was pretty good and not obnoxious. Ollie is being a pissy little bitch but watching him fall apart is interesting. Gaeta's character continues to make a good contribution and now he knows what Chloe has been doing. The end with Zod was pretty cool too.