It's such a good idea to seek marriage counseling if both parties are willing to attend. If one party is going just to please the other the outcome isn't likely to be successful. Marriage counseling can be a best friend to your marriage as long as both spouses believe it's the way to go in order to heal the relationship and grow from there.
Communication is the key to any relationship, especially marriage. It is work every day and is never easy. The success rate depends on how willing both parties are to participate and change.
Sara Cole, MS, LPC, CAC III, NCC
You could read about the effectiveness of marriage counseling on Psychotherapy Networker.