I think the finale could've been better if they hadn't spent the first hour focusing on the wedding. But it was decent. Lex always was my favorite character on the show, so it was nice to see him back.
The series as a whole was definitely a mixed bag. I only wish they had given us a full, clear close up of him in the suit. They kinda did, kinda didn't. But even as someone who doesn't read comics, I appreciated all the fan service.
I liked Crispin Freeman's little sister.