Granted, the TPK was definitely not the scenario's fault. The party lead the charge healing cleric first to the second to the last fight (the highest CR fight in the scenario) and then proceeded to open the door that triggered the final fight with aforementioned cleric unconscious on the ground and the other fight unresolved. Ended very quickly after that.
All of that said I loved the NPCs in this scenario, well fleshed out and a lot of fun to play. Lady Darchana's complete lack of regard for any interruptions was particularly fun for me. OOCly I'm regularly telling certain players to give others a chance to talk, so when one of the quieter players spoke up first it allowed me to let them run the conversation and shut down the power gamers icly when they tried to add their two cents.
Okay so yes this scenario isn't very challenging, especially for those running it at low tier, but it is a lot of fun. I ran this for our weekly PFS group at the store and after being briefed the party really only came away with two things:
1. There's this crazy old Pathfinder/Venture-Captain who needs rescuing.
2. This jungle wants to murder you so hard that your entire family line winks out of existence.
I found this pleasantly surprising since some of these people tend to be on the "meh, someone else will have the alchemist fire" side. Everyone who could came with necessary preparations and they had a relatively easy time of it. Has the potential to teach anyone not used to self-preparation the error of their ways while keeping the combat relatively simple. Does a good job of preparing them for part 2. I love the enemies used in this scenario too, just made them more paranoid. :)