Started watching Dark. About 2 thirds into season 1. Pretty decent so far. I really hope they manage to put a good twist to the classic time travel tale.
My only complaint so far is that, and maybe this is just me, but I find most of the song choices (the songs that have lyrics I mean) they use throughout the episodes are just bad choices. I either find they don't match, or have a corny "pull-on-your-heartstring" vibe, but done in a cheap way.
Actually, another complaint is that it's in german.

So most of the time my eyes are on the subtitles and not the picture. And this is double annoying when someone narrates, and the picture presents something different, so you need to watch both at the same time. Annoying.
But other than that, it's good. And I love how it's shot. It looks beautiful.