I have watched two episodes. During the first one, I could not help but think some of the major themes of "Big Love," (minus the compound) were present and thought the show was just okay, not great. However, after viewing the next episode, I was annoyed and bored because it repeated roughly 60 percent of the prior episode. Soap operas do some repeating but this show takes this technique to a whole new level.
If you kind of liked "Sister Wives," you will really enjoy renting "Big Love." If you really liked "Sister Wives," then you should see a neurologist.