So, if one looks at the core rulebook, one will note that a level 2 standard DC is 16, a very hard DC is thus 21. This scenario has many, possibly most, DC's in the 20's for a level 1 scenario. I cannot excuse a game where they are not willing to follow their own rules. My encouragement to Paizo here is "Fail Fast", retire this and start over.
Would definitely not recommend it at all. This scenario has some heavy assumptions for the average gear carried by a third level party. The roleplay elements we encountered were enjoyable, however the combat was tedious and near impossible for our party. Might be okay for a higher level party, but DO NOT PLAY AT LEVEL 3!!!!!!!