Overall story is good but the hook are quite weak though S8 changes made many older hooks meaningless. Throughout the module, the most asked question is "Why are we doing this again?" (more from factionless players but even Zhentarim players questioned the motive because it was not accordance to Zhentarim tenants). Basically, the module had too many plot holes for my players.
Combat balancing was quite inconsistent, some fights are way too easy while other were way too hard. As a DM I had to redo many of the fights to cater to my players (run twice for a group of fresh players and another group of experienced players).
Having part 2 and part 3 of the trilogy come a year later is... not the best.
Edit: Meant a 3 not a 2.
[3 of 5 Stars!]