This adventure took my party of 3 level-5 characters about 8 hours to complete, though we skipped the 3rd level of the dungeon, which would've added about 1.5-2 hours. The campaign is fairly straightforward to run without requiring much preparation from the DM. Each room is fairly modular and the DM can read 1 room ahead of the party during game time.

I highly recommend reading this review before running the campaign: https://chaoticneutraldm.com/2019/04/25/hidden-shrine-of-tamoachan/ The campaign has a few encounters that are better off skipped, and the review does a stellar job of describing which rooms to skip and why. It also goes over several dungeon mechanics (random encounters, ticking poison damage) and I think their way of running the adventure works quite well.

There isn't much of an RP opportunity in this adventure as written, but there are a few encounters where the DM can exercise some creativity. My party managed to skip three major battles through RP, one by locking the monster in a room full of burning oil and two by appeasing the creature.

The adventure is also slightly anticlimactic because there isn't a final boss at the end (the goal is to escape the dungeon, so the party encounters a major boss early in the adventure). I used a toned-down Ashyra from "Flee Monsters!" as a final boss that demanded the party leave all their loot if they want to leave the temple alive.

note: This review assumes the adventure is run from the bottom-up (as is intended) The Hidden Shrine of Tamoachan is a deadly, mechanically intricate, oldschool dungeon that has many unique creatures and rooms that are cleverly designed. That being said, most of the rooms are filled with an assortment of hazards, traps, and scenery that; while extremely rewarding when run smoothly, can be very daunting to prepare for as a Dungeon Master.

If you are a DM who enjoys challenging your party with mechanically rigorous environments then this is a good dungeon to run. The dungeon (and ruined city above) can be placed anywhere, though they draw heavily on Mayan and Aztec mythology so if you're comfortable with that existing in your world, then it won't be a problem. This dungeon is a museum-style dungeon where there are plenty of things to look at, but touching said things is a bad idea. With that in mind, I think if your party has reckless characters who enjoy roleplaying them as such, they are going to have a deadly but very fun time (and by the same token, a risk-averse party won't be able to enjoy all of the deadly toys in the dungeon).