It was the first time I'd run into a therapist that did this, and it worked really well. She always made it clear, though, that it was her job to manage the time, even if she was going by process and not clock time. It helped me relax a lot more, knowing that I didn't have to do her job as well as mine. (I have had a couple therapists where I wondered how they managed to graduate from school without paying someone off, and that was stressful.)