Cellar of Death has the best adventure hook ever. No spoilers, but it really united my PCs in a way 'you meet in a tavern' never could. That alone is worth the price of admission, then add a great adventure on top of that. If you are running Tomb of Annihilation it is a must have to kick off your campaign. ToA is a great story, but the intro is just meh without Cellar of Death. It could even stand on its own as a one-shot. Last point, as a member of the Tomb of Annihilation DMs FaceBook group, this adventure is constantly recommended and the buyer is never disappointed.
[5 of 5 Stars!]