I don't get it. The plot is pretty damn straightforward. It's only hard to follow if you're only half paying attention, imo. I thought this was a brilliant movie, loved the atmosphere, performances, cinematography, all of it. And it didn't even feel slow to me, because the intrigue level was so high, and there were scenes I found so stressful I might as well have been watching an action thriller.
And btw, the praise is from people who HAVE seen it, I don't get where comments like "the praise is from people who hope it's good" come from, or even make sense. Obviously, the critics saw it. It's been out internationally for months. I've seen it twice and will definitely be seeing it again before it leaves theaters, because the 2nd time was twice as good as the first. Some people just think it's an awesome, near-perfectly-crafted movie. No need to make up flimsy excuses like for why it's receiving praise.