This is an awesome game, I enjoy the gameplay aspects and the tense environment that it gives out, and I'm sure that anyone would enjoy this game if they're into survival horror, given that they can forgive it's not what it says it is.
The trailer to this game hit as a whimsical, carefree game, they say that it's a bright and humorous survival game with no worries, but once you get into it, there isn't anything happpy or funny about it, it's a dark, gritty, survival game with tension to it's core. There's a steep learning curve, as they don't tell you anything about it, which leaves you to dying 50 times before you even understand where that sound was coming from and what was making it. If you can forgive that it's not what they said it would be, you can enjoy Sir, You are Being Hunted for what it is.
Would I recommend it, and for who?
Yes, I would recommend it, but only for skilled gamers who appreciate games for what they are and not what they're said to be.