A really fun encounter to run. The puzzle themes in a casino run by a giant beholder in a suit is something very different from your regular dungeon crawler, and is very memorable to the players. The picture of the beholder was something many others in my Adventurer's League seemed to enjoy, even as some were only spectating the oneshot.
The first part of the session gives a lot of opportunity for the players to roleplay, while the second half (can be) a lot more combat oriented.
For my table, the 5 Level 3-4 players are very experienced players that prefer really challenging combats, so I made a few adjustments (doubled the knights' hp, added 2 extra centaurs and added an extra cambion). I feel like for my party the fights wouldve otherwise been pushovers, but this is not adviseable for less experienced/lower leveled/smaller party/less combat heavy parties.
Mechanically and thematically, this document has been made really thorough, so even though I improvised a lot more flavourwise for my party, it wasn't all that necessary (the tone is set very well within the document itself).
Would definitely recommend for others to play.