Wow, that was a rollercoaster, to say the least. The first six episodes were downright amazing, and I impulsively rated it as a nine while watching. There is a moody angst lingering through each scene, and the characters slowly figuring out the truth was immaculate storytelling. However, the mystery built up to something it couldn't deliver on. It slowly fell off, becoming more pretentious and convoluted. The middle half was fine and kept me engaged, building tension and drama throughout. It's the last four episodes that the story fell flat; almost every character arc was resolved off-screen or unresolved completely.
However, because most of the series is really good, I do recommend it, and it is one of my favorite shows, even if it's a guilty pleasure.