I can tell you that both my W and I were happy with the mediator session. It sure could save you a boat load of money in legal fees, plus it can help to soften any hostilities that would arise from an all out fight through the courts.

I like what JustMe said about the odds being better for M's being saved when there is an A.

Are you really at peace with finalizing the D if you get a good settlement? Just be honest in your next talk (maybe not final) with your W on how you feel.