I folded this into an ongoing campaign with only a minor alteration (the general fought drow, not orcs). The pacing was fantastic. My players were on edge from the moment the evil doll showed up and could never guess if a room was going to be narrative or combat. Delicious!
They cleared the first floor completely before heading downstairs and nearly wretching at the gruesome puzzle. The only critique was that the evil doll worked too well. When they went upstairs I wanted to draw them away from the main fight room so they'd explore the rest of the house first. I had the doll appear in the hallway I wanted them to take and then glide into the far room, hoping they'd follow.
Nope. They were so terrified of the doll they immediately went the opposite direction (running into the doll anyway in the waiting room). Not to my plan but a boatload of fun.
[5 of 5 Stars!]