I agree with the two previous commentors (see below), this scenario left me wanting.
I want an explanation for how the bad guys got there. If this will be explained later on somewhere/somehow, that's fine, but if not, an explanation should have been included.
Multiple combats against the same type of bad guys (cave inhabitants and generic bad guys) gets boring, even if they are a bit different in combat themselves (bow opposed to sword).
It also doesnt help that the generic bad guys are badly statted and have no feats that help them be effeective in the type of combat that the scenario says they are there for ('archers' with no archery feats at all, etc).
The lack of flavor of the setting made it pretty boring to run, and the scale of the cave was annoying. Also, along that line, if the map is on a 10ft scale, that means the 'human made bedrolls' in one section of the map were somewhere around 10ft wide and 12-15ft long...
Faction missions were decent, though some were far too vague to allow the player to know what he was even looking for, and the description of the sought item didnt give any hints that THAT would be the McGuffin, either.
Unlike whichever of the previous reviewers said it, I liked the optional encounter being after the BBEG. It was a change of pace from the regular, though the puzzle was poor and gave no way of how to handle the situation if the PCs are unable to make the required skill check, but still want to give it a shot.