All GMs should get this scenario and have it as one of your "back pocket" possibilities. It has very good replayability, and allows for quite a bit of power adjustment in most encounters, making it easy to tailor the overall experience to fit a group of brand new players or a group of experienced players and any combination in between.
Although the scenario has tighter rails than most, there are opportunities to deviate and allow a creative group unique solutions. The way the role-play/railroad scenes are written do provide for excellent options to provide the illusion of free will, while always resulting the same, save some amazing rolls or creativity. The combats can pose challenges, twice now I've nearly taken an unconscious agent to a watery grave, but even a group of less than optimized characters should be able to achieve the primary mission with little chance of scenario ending encounter. Even though I did find most of the role play fun, it is a challenge as a GM, as RP portions can "eat" a lot of time. It was hard to get the players "involved" in the merchant selection, too much NPC vs. NPC dialogue/banter in my opinion.
Overall the scenario is worth playing, but seems to fall a little short of the mark.
