I have run it several times. If the players follow the rumors from the child Pip, they enter through the tunnel. That means the first thing they encounter is the Nothic, who I thought was the most interesting thing in here. I play the Nothic as insane, intelligent and always hungry. It feels that Glasstaff hasn't been holding up his end of the bargain to provide fresh meat. Between truesight, wierd insight and the 3d6 rotting gaze it is pretty intimidating in negotiations. I have it throw out a partially eaten arm between it and the party, screech "Does that look fresh to you?" and then hit the arm with a rotting gaze. The sight of the arm withering, turning black and developing boils usually prevents parties from doing anything rash. It will tell them about the secret door back entrance into Glasstaffs room in exchange for "fresh meat". Glasstaff fits the bill. If the party is willing to provide lots of fresh meat (many bodies) it will trade Talon to them.
Glasstaff doesn't last long if surprised.
