One thing to be aware of - if it appears a marriage could be in big jeopardy, a good and astute counselor may appear to side heavily with the partner that is the one most looking to jet.
Reason being is the nonjetting partner is already willing to work on things and accepting responsibility for their role in the problems. The one ready to jet is often feeling they've done everything forever and what is the point of now trying more and accepting no responsibility for their actions. Yes, they may admit they did things that were not right but it was only because the other person drove them to it. If both think they are blameless, well then the counselor really has their work cut out for them
So, beware this is always a possibility and you may have to take it on the chin for a bit if this is you.
But in the end YES it will be good for you. It will help you see better how she thinks/reacts, and how you think/react