I love this game. You just get dropped into the weird world from the outset, and the story gets fleshed out as you go along.
The world is beautiful and the characters detailed and realistic...probably the most realistic I've seen in a game.
The gameplay is pretty slow paced for the most part, and I can see why people can find it dull. But I love the challenge of just getting from A to B and have had some genuinely tense moments avoiding BTs and Mules.
I've put about 40 hours into the game and can easily see me getting another 40 out of it before completing the story. I highly recommend this game if you are looking for something a bit different. It's not for everyone, but it's definitely for me.