An enjoyable adventure. It can be finished within the recommended two hours with a little focus, but it's easy enough to stretch it out longer if you're so inclined. Plenty of space for exploration and roleplaying for the groups who want it.
Warning! The rest of this review contains SPOILERS!
The premise - an infiltration mission into the xenophobic city of Hillfar - is a great opportunity for characters to improvise and problem-solve. In my experience, there's enough to do even for characters who are usually combat-heavy.
A few recommendations for DMs:
If you think you may be short on time, you can start in media res with the rat swarm fight in the sewers. Then, introduce the mission in flashback.
It can be difficult to make each member of the First Lord's inner circle distinctive. If you have time, bring some Paizo face cards or other fantasy portraiture to use as props, so it's easy for players to remember each of them.
- In the scene where a character spies on Thessaly with the sending stone, have her destroy it with a draining kiss. It makes more sense than her crushing it in her hands with her strength of 8.
I especially appreciate that the adventure has given some though into what happens if the PCs get discovered. The adventure could turn from an infiltration mission to a tense chase scene at any moment, completely changing the story while remaining fun and engaging.
[5 of 5 Stars!]