This is sad for me b/c I thought I'd get along great with Karma's g/f. When we talked poly, I had dreams of our happy little family. Living together and sharing life. Even she and I weren't in a relationship, I still looked forward to a close friendship. That isn't the case with g/f and it's a huge disapointment and causes issues for all of us.
When Panda lived with us, it was like a fairy tale. It upsets me that I don't have that with g/f.
I do think having a good relationship with metamours is a beautiful thing. Quite possibly one of the hardest to aquire.