This module can be pretty short and fun, but it is deadly for the unprepared party... Even the prepared party may have issues. Which from what I've read can be pretty hard.
Not a lot of us carry around cold-iron, silver, or good weapons. In addition, as meta-gamey as people will say, I still think there should at least be some items to help such as weapon blanch or even a cold iron weapon. The Pre-gens included are no match for them, even with more than 6 players, two of which were not pregens.
If you run it, I HIGHLY HIGHLY recommend you do it with experienced players, and those that are ready for it. I do NOT recommend running this for new players.