I played through this.
-- Target Level: 2nd level (paladin 5).
-- Story: 4/5.
-- Pacing: 5/5.
-- Combat Difficulty: 4/5.
-- Combat Design: 5/5. Although I would give the last one a 2/5
Introduction: Clear faction based hook. There was one part at the beginning that strained belief related to the descent order. The Redplumes are supposed to be super bigoted against nonhumans. Why would we all go down at once with them on the crank? The module doesn't address this.
Exploration: Some dungeon delving that ultimately turned out to not matter much (at least that section).
Pacing: Good pacing.
Combat: So combat is a bit skewed in this review because the DM was rolling terribly and we had some great on hand spells/features for dealing with demons. He had my paladin under Hold Person and despite attacking a paralyzed target, could not hit Like at all. If he was rolling more typically, the combats would have been: medium, easy, medium, hard, and hard. Instead they were medium, easy, easy, easy, and medium.
Roleplaying Opportunities: Faction contact called me a sissy, I wrestled him to the dirt.
Overall: I enjoyed this module.
A second thing bothered me: Why are huge things invading dungeons that are like 7-8 feet wide?
[4 of 5 Stars!]