Went yesterday, and it was really not worth £12. It was £12 for us as we are students, the standard price is £20. The acting in the 3d-movie was pathetic, the only decent thing about that movie was one 3d effect which I won't spoil. As for the main attraction where you walk through the dark, being greeted by classic horror characters, it was OK but wasn't as good/lengthy as it should've been. It was around 5-10 minutes for the movie, and another 10 or so minutes for the actual walk through. I would say go London Dungeon instead, it's much more worth the money.