Seriously.
I liked 99 rooms, and to say, this is almost exactly like it. When my friends told me it was like 99 rooms with more scary stuff, I was delighted.
In my opinion, it sucked.
Imagine, you're playing HL2, and you come up to the level "Ravenholm" Then you have to go through this factory in Ravenholm, with excessive gore and torture mechanisms in every room.
A Horror fan's delight? Read on.
Then you notice as soon as your about to be scared, the sun comes out. happy daylight! Shiny. (But of course in some scenes it adds to the suspense) Then as you go through the door to the factory, you wait excessive waiting times.
This goes on for alot of rooms, wait, be scared..ish, go through door.
At the end you reach this "Under Construction" Sign. Thats it. No screamer at the end, no suspense, no Extra gory scenes. You do not escape. You just see "Under Construction". The end. You "Win".
I like the way it plays out, and I have to admit: I was scared at the broken TV part and at the "Can you see me?" Written on a wall in a completely dark room. But either than that, the loading times killed it.
But that's just my review. I highly suggest you try it out, so you can see what im talking about. It's an "experience"