It kind of drags a bit ... or is a slow burner if that makes it sound better. It is not an easy watch at first ... but it does get to a point where you finally get invested in the characters. All the small talk up to that point may seem benign, but maybe it helped create the mood? It may work for you or it may not. I know that the twist towards the end might put you as much off as it did ... others here.
This is not an easy watch. Very slow burning with the big question, what is this leading up to. You may have issuees determening that, which I reckon is supposed to be that way. It is just unfortunate that the ending is such a letdown ... or is it? You may see it differently, I reckon the majority will feel cheated (no pun intended)