Overall, a fairly entertaining episode, but weak as THOHs go.
Criss-Cross Act: Yeah, this one was weakest for me. It didn't really click for me, although to be fair I missed the last minute or so because my roommate needed something. Seemed somewhat forced and brief.
Zombie Act: I'm probably biased due to my enjoyment of zombie movies/novels, but this was easily my favorite. The humor, atmosphere and flow were most appealing. Like a previous poster said, though, I didn't like the ending all that much. I am awaiting the reaction of an IM acquaintance of mine that hates anything zombies...
Sweeny Todd Act: I think this was a very creative story, but the set-up of it being a show with in a show made it fall a little flat. This one would have worked better as a full or half episode.
Over all... solid B.