It was my first view into this life, except for reading some stuff on websites and ebooks. Now I've read some more, and given some more tought to a variety of poly-subjects, I understand all of your concerns, but for me personally it was a game change. It finally showed me that I am not crazy, that it is a way to live your life, there are people doing it!
That was extremely valuable. In fact, while I am not one to show emotions very quickly, I cried multiple times while watching season 1. Once during the first episode because it was all so emotionally overwhelming, and once when the triad came out to one of their moms. Her reaction of her being so proud of her daughter was just something that struck home.