This adventure is fantastic. It adds so much lore and depth to what was nothing more than an x on the map for the ToA hardcover. My favorite part of this adventure is the amount of variety in running it. Depending on the tier of the players, you're playing a completely different adventure. If you only have 4 hours, you can run this as a one-shot session. If you want to get deep into the ruins, the random encounters, suggested encounters, and location descriptions provide at least 2-3 sessions worth of material. I have played the tier two adventure and run the tier one adventure, both as part of a ToA campaign. I plan on using the tier 3 adventure as a sequel to ToA for another campaign I'm running.