Success after treatment?

My husband has an appointment at a clinic for Adults with ADHD.  I am hoping they will treat him with medication and therapy.  I am hoping to see some improvements in our marriage and future.  He says that he wants to get help. He seems to be looking forward to getting help.  He is afraid that he is going to loose me.  I think that he is sincere.  I am looking for hope.  I would like to hear stories about how your life/marriage changed, improved after ADHD diagnosis and treatment.  I also would like to hear about what treatments, therapies, strategies, etc... helped.  I realize that change will not occur overnight.  What changes did you have to make?  I don't want to be disappointed again!