I ran this recently, and I must say, this Module deserves its excellent reputation. Rare among modules, it places a lot of emphasis on roleplaying, but still manages to provide a strong combat experience. I'd say the balance is as perfect as any I've played, or perhaps moreso.
On the roleplaying side, Zora Culkin and Dawsom along with the visit to the Hospice provide for amazing interactions among the characters. At the end, they managed to save Zora, and the Dwarven Wizard accepted her sponsorship with the Cloaks! What a fantastic story award!
In terms of combat, the Manor was a wonderful surprise for all of my party members. I provided a layout of the mansion and asked them where they settled in for the night. The assault scenario provides the perfect opportunity for DMs to tailor their encounters and provide a lot of dynamic challenges. It was incredible, and probably the most satisfying experience I've had as a DM. The players beat a hasty retreat, just before the mansion collapsed.
My only criticism is not really a criticism in truth. As others have noted, the final battle is a bit weak. However, after the mansion encounter, I let this encounter proceed as written, giving the party a satisfy bit of revenge against the cultists. It worked perfectly for me. However, if you want to drag it out a little bit, throw a Salamander in there, or swap out a couple regular cultists for Fanatics, or maybe a few more Azer.
Overall, I highly recommend this adventure. Please note, it runs pretty long if you let the roleplaying flow naturally.