I picked up this adventure for its puzzle focus. I actually ended up converting it to another system other than D&D5e, but to no detriment of the adventure. I ran the game for 4 players this past Saturday (Jan 2017) and they absolutely loved it. Due to a unique character in the party, they even solved one of the puzzles in a different way than explained in the adventure, albeit just as valid and just as fun. The mechanic to allow the players to ask the DM for help if they are stuck really was a benefit as it started getting later in the evening and brain power dwindled.
All in all, everyone enjoyed the puzzles, enjoyed the few fights (especially when they are still trying to solve the puzzle while trying to stay alive), and really got a sense of the story and history of the place even over a one-shot adventure. The entire adventure took the group 5 hours in a casual setting (someone's home).
[5 of 5 Stars!]