No, it's not Dark, but it didn't strike me it was trying to be. For one, it's far less serious. There are exactly zero comedic characters in Dark, while this show has three. The science is over the top, but as long as you're not a doctor or a scientist it's possible to suspend reality and just enjoy the story. It's no less implausible than Rain. I thought the main character was quite good. The pace was a little too quick. I think it would have been better spread out over a few more episodes to give more opportunity for the characters to develop, but they did a good job in the 6 episodes they had to work with. American network television can't manage the same level in 12 or 13 episodes most of the time.
I'm at that point where I'm struggling to find something really good to watch I haven't already seen. That happens when you binge watch too much great television, so you find something to hold you over. This did it for an evening. Looking forward to Season 2.