"CBT for low self esteem"

I recently had 12 sessions of CBT for low self esteem and cannot rate this experience enough. I have been suffering from depression on and off for last 2-3 years and several times before in my life. I have had CBT for post natal depression, couple's therapy and guided self help for depression in the past and they have all helped tremendously but I feel that this course of CBT for low self esteem really dealt with the root cause of my issues. My therapist was very knowledgeable and "on it" and I found her understanding and warm but also firm, encouraging and positive - it was very easy to work with her and I couldn't believe how much work we got done in 12 sessions. I finished therapy about a month ago and have regularly visited the work we did and carried on by myself as agreed would be helpful. My thinking has changed and I see that I'm using my CBT skills now in situations that would have triggered a couple of day low in the past. I can truly say that I no longer suffer from depression - even normal bad days feel different now and I know that I'm well again.