Just finished the first season over the weekend. It does take a while to find its footing, particularly regarding its characters, which sometimes feel a bit too much like winky-winky self-aware 60s archetypes, but the details of the alternate history are a lot of fun and I appreciate that they're at least trying to do their homework regarding the technical aspects, even if some liberties are taken. There was some stuff in the last three episodes that had me white-knuckling.
I'm excited to get started on the second season.