Most of the users on this site will advise you against MC. Once a WAS is "done" it usually just makes the situation worse. I can tell you that my H and I went through this 7 years ago and it was MC that finally drove him to the point of wanting a separation, so I didn't push the issue this time around.
^^^THIS^^^ I'm convinced marriage counseling is what pushed my XW into separating. I don't blame the counselor, XW was looking for a reason and the C gave it to her. That was all she needed to get the ball rolling.