Most marriages can substantially benefit from a few counseling sessions.  A marriage never gets completely "fixed" in a counseling session, as in any relationship ongoing attention and work is required.  The couples who do the best are the ones who come 1-2 times a week for a short period of time and then continue to come infrequently for a longer period of time.  This is completely optional and is up to each couple to decide their needs.  Some couples come in for just 3 or 4 sessions to address a specific concern and that is a very reasonable option.