This scenario is tough to run, and has little combat - that being said, it's a blast to both run and play if the party gets into it. The mechanics, once deciphered (DONT run cold), are well put together, and make for a fun, well paced investigation.
This is one of the coolest, most flavorful scenarios I've ever seen. Both when I played and ran this, the party was paralyzed by fear half the time (the GM I played it with was a master, and the scenario lends itself to vivid imagery). Every decision, even to move 5 feet ahead, felt like it had real weight with dire consequences lurking everywhere. The combat can be tough, and the environment is perfect- a scenario that will have players talking for a while!
This is easily my favorite scenario ever- I've played it once and run it 6ish times, and I always have it prepped and ready to go in case someone wants to play it! The investigation feels open, the NPC's are interesting and memorable, and the fights have serious teeth! One of the few scenario's I've killed PC's with, and more often than not when I run/play/ hear about it, someone dies. It's perfect!
This is easily in my top 5 scenarios, and was a fantastic play experience (despite having s GM who admitted halfway through that he was high as a kite). It's inventive, and forces the players to think outside of the usual "stroll down the railroad, murder the things that make you pause" mentality. All of the complaints I've heard are solely due to GM's not prepping and trying to run this cold.