Just played this scenario. Simply put, it's absurdly deadly to any 1st level party. There's two encounters that hover around CR 5, which is just too much.
Spoiler:
The final encounter has the BBEG with a +9 to hit for 1d10+4 damage - that's enough to one-shot just about any 1st level character. As if he's not bad enough, add in 5 additional enemies. Without seriously lucky rolls, this is a TPK waiting to happen to a APL 1 party.
