I'm loving it so far! A lot of made-up scifi shenanigans, but I don't mind that so much. The characters and their relationships are really being tested, which is what I like about it.

Season 4 is the last one, I was hoping to get caught up to watch it as it premieres, but I'm not sure if that's going to happen. I think they're about 1/3 of the way done with s4.