Masterpiece. Must watch the series first. The end of the show was a bit confusing. The movie is a bit confusing as well and creates new questions but it answers many bigger questions. This makes really wants you to look at yourself and think HARD. Thank Jebus for that! If you've seen the show, it is pretty much a better and more thought out ending.
I essentially consider this a part of the show, not a standalone movie thingy. Keep that is mind and enjoy!