Not scary (at all), but very fun to play. A very good buy.
The controls work really well. They're almost perfect and I say almost because they are only almost. The problem comes when you need a precisions shot, like at the heart of a zombie. The aiming is great for larger entities but when you need a heart shot so you don't waste ammo, it seems like the only time you'll get the perfect shot is luck. This is because your cross-hair isn't very steady, it jumps and sways just enough pixels out of the way to get you to miss. Other than something like that, the controls are great. Aiming is neither too slow or fast, your characters running is at an almost perfect pace for the game, and walking, while slow, seems right for it as well. Doing various tasks like reading notes and taking weapons is quick, seamless, and easy. And it doesn't offer you the annoyingly obvious question "Will you take the Shotgun?" that pretty much every game delivers, to end the description screen you just hit the take button.
Story, I've only gotten four levels in for a certain problem that will be addressed later, but so far there is almost no story. You mysteriously wake up in a hospital that seems a little less than sanitary and you make your way through it, battling creatures who I can only assume are malpractice lawyers and their offspring. But no matter how oblivious your character is, it becomes apparent within the first five minutes of the game you had murdered someone, or somebody else certainly thinks you have. Aside from that, the only other bits of what I could think of to be a story here are random medical records of other people who's problems are schizophrenia and other darker illnesses.
The difficulty in this game is perfect. You'll loose health, find health, and sometimes die. But when you die you're only dying because you didn't know that you had to run from that enemy, or they came at you from behind, or whatever. But there is a problem with that in this game. After chapters one and two (the combined length of them is about 15 minutes long), the chapters start to become around 20 minutes to half an hours length. If you die, you have to start at the very beginning of the chapter. No checkpoints, no second chances, you start over. I have yet to beat chapter four because I get to the boss and I die from the fact he's not only stronger than you, but also faster. I've found what I assume is the right way to kill him and I'll get back to that soon. But it is kind of annoying to have to restart the entire chapter, no matter how far in you made it. To make things even more confusing, every time you enter a door you see "saving" appear on one of the screens... so what is it saving if you, no matter what, restart the chapter? I can't complain completely though. This keeps you afraid of dying, and with virtually no death penalty (like in BioShock) the game would seem too easy.
All in all, I give this game an 8.5 because it is fun, but it tries too hard to be scary when it just isn't and restarting an entire chapter, while an effective death penalty, is just plain annoying if you've made it to the end of the level and just die.