There are some who say that MC is not helpful, even hurtful when only one partner wants to be there. There is also another theory that says that often spouses use going to MC as a way to justify their behavior/actions, i.e. Well, I TRIED to make this work by going to MC and it didn't work so...
In any event there are more than a few ways MC may be something other than a way to repair your marriage in the eyes of your H so I DO think it's important to just appreciate that he's going at all. Just be aware that he MAY be using the sessions to an end that is decidedly NOT in line with saving your marriage...and remember, MAYBE he's doing this, maybe not.
