I've never seen a poly relationship where everyone is completely happy and fulfilled in the long run, but love is love and so long as its not harming anyone people should be able to live however they please. Its also sad that families live on the run and have to be split up because this is considered a crime.
I'm in a newly formed triad and it's been an interesting experience so far. Jealousy was a slight issue (not from me, personally) and was easily solved with communication. Other than that, everything is going well.