I think pretty much everybody here already talked about the ending, and I'm also aware of the fact that nobody will ever read this review when there are already so many. But just in case I'm wrong -- just in case somebody (you) does find this review -- let me tell you this, and please heed my words: The ending really is that insane. It's worth watching those five episodes just for the ending -- if you don't mind putting your mental health under severe risk.
It's been months since I watched this shit and I still can't get it out of my head.