I do think that it is different when you are ending with a T that had a positive affect on your healing. When it has not been healing for me, I have just sort of treated it as a performance review of sorts. I just laid out what I thought was good about the time with the therapist and what didn't work. I had one T that was absolutely horrible and judging, I spent the final session telling her how I felt she had failed. I'm sure it was not so good for her but it made me feel better that I had been able to say that to her.