Well, despite my protests, my group ran this module anyway, since my DM had already bought it and we'd done the other Falcon's Hollow adventures.
This wasn't "mature". This was pathetic. This module needlessly heaps on the gore, thinking that blood and guts and skins and eyeballs pave the path to being mature, serious gameplay. Human-face ticket booth with severed tongue tickets and eyeball lollipops isn't shocking, it's not even cartoonish, it's just... sad. It's like this module is one long, desperate cry for Daddy to pay attention to it.
I guess you're supposed to feel like the evil people of Falcon's Hollow deserve their torture and death, and if viewed in that light, it plays out like a fantasy cooked up by a emotionally disturbed 6th-grader who was tired of Falcon's Hollow bullying him in gym class. This module should have resulted in a trip to the school counselor.
The encounters aren't done very well, either. They're loaded with save-or-suck effects, and some of them don't even make any sense. What's the point of having a nymph in the peep show if the illusion means nobody actually sees her?
Our GM gave us a happy ending, but told us what the original ending as detailed in the module was -- a pointless downer that basically comes out and says "ha ha, you suck and can't do anything about it, ha ha".
Blood and guts and "you suck" endings do not make something mature. This was, in fact, one of the most immature things I've seen in gaming, and it would be right at home with the worst offerings of mid-90s White Wolf Publishing.