Finally had a chance to run this adventure for my group and they loved it! Most were unfamiliar with Eberron and one was completely new to D&D so we ran a zero session to get them up to speed.
Like a lot of mystery plots, it matters how much your group puts into it. The handouts for each archetype were very useful to help my players get into character.
I love that there are multiple versions of the document so I can read it on my phone for prep and print it out for use at the table.
The only thing I found myself scrambling for was a DM 'cheat sheet' for running the unused archetypes. Just a single page with a line or two for each so I don't have to flip pages while at the table.
Can't recommend this adventure enough!