Other posters aren't kidding - that first encounter will put over-confident Pathfinders in their place, but it *is* survivable. GMs should definitely read the rules and GM threads around how this encounter *should* be run to give the players a fighting chance. A poorly run first encounter is absolutely deadly in this one.
That said, it's epic in feel, with an interesting variety of encounters and challenges with a definite lethal threat for Pathfinders that don't stay sharp.
The final combat has a lot of complexity that takes some work to prep and run, but provides a very satisfying experience.
GMs and players - bring your 'A game' and enjoy this great adventure!
I enjoyed running this scenario quite a bit. Unlike many of the Season 4 scenarios that take 5+ hours to run, this one should complete in under 4. It can be brutal though, if your party isn't prepared for it.
There is an interesting 'trap' a potentially very interesting RP/fight and some fun enemies inside.
The baddies are well thought out, but complex. This requires more than average prep time to correctly utilize their abilities in combat, but you save time on map drawing and story prep. Its a nice compact dungeon.
Very flavorful for this season's themes and enjoyed by myself and the one table I have ran it for so far. Even with a player death (he got better). Recommend - especially if you need/want a thematic Season 4 but don't have 1/2 a day to devote to it.
End villain is awesome and something they've probably not seen before. This adventure has lots of atmosphere and captures a sense of horror and impending doom that is hard to bring across for jaded gamers. See the GM advice thread for some great tips on how to heighten the suspense.
PCs may die and they will learn very quickly that it is possible. The encounters are a blend of fights and haunts with a little bit of RP in the early part of the adventure. One thing to watch out for - the haunts are tough and can be exceptionally deadly, especially for an unprepared party. PCs will not be able to shoot, slice or smash their way through this one.
Loved the flavor, loved the environment, loved the departure from the same old, same old. This requires some extra preparation and it will test your GM skills, but it is totally worth it to watch experienced Pathfinders run away from scary things and jump at every noise.