Definite buy for me.
It's STALKER with a story. It's a lot more narrative driven than STALKER but it keeps that same, post-apocalyptic feeling just as well, if not better. The guns feel appropriately hand-made, to the point of having to manually pump up the air pressure in your sniper rifle. You need to wear a gas mask when going outside, which obstructs your view. Get hit while wearing it and the glass might crack, forcing you to spend the last seconds alive scrounging for a new mask. The locations are surprisingly diverse and all of them are incredibly atmospheric. Really man, I'm so excited about this game and I want everyone to play it.
If you're even remotely into post-apocalyptic games, buy it. There's also a video on my Youtube channel, which, after watching, should make you want to go out and buy it.