Just finished our beta test of Lair of the Puzzle master. Group of 4, and made it out with a minute to spare.
By far one of the best designed rooms in town. Everything about the room is completely immersive, even in its beta test period. The puzzles are numerous, challenging but never seem impossible.
The interaction between the staff and the players is maybe the best part of the whole experience. Extremely helpful, and they stay in character throughout the experience.
I can't wait for the other two rooms to be completed.