My only requirement is that we have a MC who is "pro-M."
You also want one who is solution oriented - who will focus on what each of you are DOING rather than on what each of you are feeling.
I wasted a lot of time with one who only wanted to talk about what we were each feeling this week - the net result: week after week of my w saying "I don't know, I just don't feel anything". It never went anywhere.
Me 42, W 39, S8, S6, S2 M 11y, A & ILYBNILWY 11/08 Walking away from a bad situation.