The Vampire Hunt trilogy is a direct continuation of the Umbral Aristocracy trilogy; and I found that prior trilogy to be a mostly weak affair anchored by at least one pretty good module in The Map with No Name. Beyond that, though, it was an unremarkable set of modules with no real stinkers in the crop, but nothing to write home about either.
The Vampire Hunt trilogy is like that, but without The Map with No Name to at least start off things strong.
If nothing else, the essential premise of the module is fine. It's a decent excuse to go into the Undermountain. But beyond that, it's filled with odd choices that weaken the strength of the module. Why separate the path down into two completely disconnected paths? You could have instead had one much stronger one, with a centrally located lift descending around a spiral ramp. Why reduce the labyrinth into a skill check instead of actually letting the players explore? Heck, why not have the descent be down the well of the Yawning Portal, with that iconic visual, than through some cave outside of town?
The entire adventure feels completely inconsequential, a side story and nothing more. It's technically adept, and the encounters are all pretty well balanced, but it's disappointing nonetheless.
[2 of 5 Stars!]