I used this adventure to introduce a complete RPG newbie to the game (along with 4 veterans who'd never played this module before). It was an absolute blast - the handouts really allow everyone to get immersed in the story. My players split up and wandered the house alone based on the different handouts each one was given!
This adventure is definitely worth the money and is probably in my top 3 adventures for atmosphere, player involvement, and fun. I recommend putting some creepy ambient music on in the background while you're playing it.
[5 of 5 Stars!]