What is polygamy really like?

So I have been watching ‘Big Love’ today. I am finding it to be both fascinating, endearing, but also horrifying on many levels. I have never really pondered this topic before, but I have now gotten interested in it. It is not something I have ever witnessed or encountered.

Albeit it is probably a very private matter for anyone who does take part in that lifestyle, I understand not many will want to discuss it here if anyone is actually practicing it.

What have your experiences been with polygamy? Have you simply seen it from afar or are you actually practicing it, or have you practiced it in the past? What are the day-to-day rituals actually like, and what makes people become involved to begin with?

I would appreciate some thoughtful and insightful answers!