Let me start by saying that this module is FANTASTIC. If you are looking for a Christmas-y adventure then look no further! It is some of the most fun our table has had playing D&D. The Home Alone references had my players laughing throughout.
Unfortunately due to time restraints I was not able to run the Yule Boys so I can't comment on how well they play out but everything else worked out great. I opted to use all 3 of the big bads listed and I'm glad I did, it was fun seeing the party split to fight 3 separate monsters bosses. I also changed the Deck of Merrythings to just some cookies with bonuses (again, mostly to keep things tight on time for the show) but the Deck is amazing and could probably be a supplement on its own.
The theme of this adventure is spot on, it really got us in the Christmas spirit. I highly recommend it for a December one shot!
I DM'd this for my podcast and YouTube series so if you want to watch or listen to a playthrough you can check it out below or just search "One-shot Onslaught" wherever you download podcasts:
[5 of 5 Stars!]