I expect this depends a lot on what your issues are.
I'm involved in a collaborative settlement process which is a "legal" process. I didn't feel like my W understood enough about the issues we were facing for a mediator to work. I am hopeful that once we work out our agreement, and she sees just how much of a financial impact this will have on her (and our daughter) that she may be willing to give our relationship one more chance. Since she won't really give me a straight story on how she decided she wanted a divorce I believe that there may be a chance that she will rethink thinks once the reality of the situation is right there in front of her.
If you are going to reconcile it has to come from the two of you, not the mediator, IMO.
Good luck, I hope the result is one that serves your best interest.
