I know a lot of people who are polyamorous, most of them are pretty happy. Its a very open honest relationship, which is the part I like. I think a lot of people think of it as swinging though and just sleeping around, that exists but isnt really what it is about. Its about relationships generally. Even people trying to join that lifestyle often mistake it. Also a lot of people think it will fix their relationship and this is far from the truth. I am not in a poly relationship anymore, but still like a lot of the ideas from it. The basic idea of that one person cant really fulfill all you physical, mental, and emotional needs from other people. Often there are needs not met by one person and they can get it from someone else. Most people already do this with various parts, such as having friends for some of those needs. The biggest hurdle that people face with it is that there are society norms that are pushed from a young age so people have those expectations of a relationship. The relationship ladder type thing. You date, you serious date, you are expected to get married, have kids, blah blah blah. Which is fine for some people but not everyone, its also mostly just because that is what was taught and expected though. Plenty of other societies have no problem with different way of going about relationships.
The biggest issue is jealousy. It is really hard to overcome for some people. Also the other biggest issue is guys often push it because they want to sleep with others or whatever and kind of lie about the reason for getting into it. What ends up happening is that the girl ends up getting as many boyfriends as she wants and the guy struggles to find anyone who wants to date a married guy and gets really upset. There are lots of other issues. Really its a fine way to go for a happy couple who is both interested and talks very openly with each other. Its also a really great option for bi people.
The biggest issue is jealousy. It is really hard to overcome for some people. Also the other biggest issue is guys often push it because they want to sleep with others or whatever and kind of lie about the reason for getting into it. What ends up happening is that the girl ends up getting as many boyfriends as she wants and the guy struggles to find anyone who wants to date a married guy and gets really upset. There are lots of other issues. Really its a fine way to go for a happy couple who is both interested and talks very openly with each other. Its also a really great option for bi people.