I went last year and really enjoyed the whole thing. Almost everyone that went through said it was great. When I took my family through (with some neighbor friends) I think the kids enjoyed it the most. My wife screamed the entire time, and I don't think she even saw anything. She just grabbed my hand and closed her eyes!
This year they have added a ton more stuff. The sets are better, the whole things seems a lot longer, and the actors and makeup are amazing!
Definitely worth going!