I took DBT 18 years ago and I haven't cut until last month. But I find that I had a very good therapist and took the class for a year and half (I'm deaf). and glad I did. It's help me a lot. Now I have to re learn the DBT. I have Marsha Linehan Skill Training Manual for Treating Borderline Personality disorder. I need to find a class in my area so I can go.