It's great. First season was a good starting point, but for whatever reason, the second made me swear off it for awhile (can't remember what specifically). Watched season 3 on a whim, and part 1 was good enough to reinvigorate my interest to the point where I've never liked it more.
So glad the series is setting up it's finale for next year and not turning into one of those shows that just keeps going long after the narrative needed too for the sake of money.