There's lots of timey whimey stuff, and not just in terms of the science fiction -- more so, we're referring to some of the storytelling techniques involved, with lots of flashbacks, sudden jumps and montages.
You may suffer from revelation fatigue by the end of it. And a lot of things - perhaps a couple too many - are not wrapped up in the story itself, but are ongoing mysteries to be sorted out later. This show is getting like Lost, designed to be picked over on the internet! Let's hope it doesn't take seven years to get some answers.
The final, final, final scene, though, will ensure you'll carry on tuning in to find out what happens next... or maybe in the story after next. Or maybe next season...