We mostly have, at times there is bit resentment bitterness but overall we do get along.
We were able to organise custody, finances etc all between ourselves.
We have done dinners together, went to fireworks together at xmas, even xmas eve we all stayed at ex's so we could be together xmas morning. Some ppl think its odd but it works for us, kids love when we are all out together, it doesn't confuse them, its just how it is.
When we are all out together, we mainly talk to the kids not so much to each other.