I have yet to watch this show it was on Netflix, but think it got removed since Amazon picked up the rights to the show. It will have a season 4 and you have to be Amazon Prime member to watch their shows. I guess in the end Prime is cheaper than Netflix, but Amazon definitely lacks the library of shows and movies compared to Netflix.
I picked the fist season up cheap on bluray from Amazon about three months ago I was so impressed by the series I bought the second more expensive series on DVD. And I have just seen that the third series is out on bluray next month.