Having played this game with 3 other people (1 other gamer, 2 non-gamers), it was a huge hit for everyone. Very light on mechanics (your stats tell you how many dice to roll--was your number larger than the Challenge? Yer good to go) but incredibly rich on theme. So much so, that my wife (1 of the non-gamers), was having a blast playing her character.
One of my favorite mechanics of this game is that when you go to a room, if you are by yourself, you can't read word for word the card you are encountering. Instead, you have to describe what is happening to the rest of your team. If someone else wants to see exactly what is on the card, they have to "travel" to that area which costs time...and time is quite limited.
Anyway, that one mechanic lends itself very much to the role playing element and our whole group got swept up into the game.
We didn't "beat the game" on our first play session and it may take a few more. And that's the one downside...it's a consumable game. Once your group knows the appropriate Decision-Tree in the game, it's just a matter of getting the keys and clues and tokens and what not.
BUT, I highly recommend this game because of it's immersive experience. I tend to value things based on the Movie Expense Equation: Will this give me as much value as going with my three friends to the movies? And the answer is resoundingly YES. In my opinion, it's better than a trip to the movies. And a few evenings playing this one scenario has me excited for the upcoming expansions.