This show appears to be another evolving mystery like Lost. Right away, we are presented with a plausible near-future scenario. Yet, there are obvious hints that something of earthshaking extraordinary significance is lurking in the shadows.
The acting is acceptable. The characters seem too capricious for astronauts, but I say this with reservation. When Lisa Marie Nowak made her cross-country trip in a diaper, the image of the cool-headed, courageous professional was somewhat tarnished.
Their justification for filming primarily in a one gravity environment is a bit embarrassing. Star Trek's gravity plating would have been too advanced for this show, but the explanation they settled on is too problematic. It would have been better if they had adopted a revolving habitat like the space station in Kubrick's 2001. In their defense, they probably rejected a revolving habitat so that they could have more inspiring views through the ship's windows. In that case they should have adopted a ship that was constantly accelerating at one gravity. Then, they would only have to justify the large power requirements. They couldn't have the casual view back to earth, but they must sacrifice something in the way of art to make a show that will sit well with their presumed audience.
I definitely intend to follow Defying Gravity. The recent debut of the sigh-fie channel's noxious Warehouse 13 left me wanting. Perhaps this will make up for that disappointment.