I'm not uncomfortable, but I can't give a useful report, for two reasons.

Firstly, there have been many confounding factors from elsewhere. In particular, I also participated in group seminars that had some methods in common with the CBT sessions.

Secondly, there was a period in which I deliberately avoided evaluating the efficacy of the method, reasoning that just as I should believe that "I'm a good and capable guy" regardless of evidence, so I should believe that "my way of fighting depression through CBT is a good and capable way". I did this for a predetermined length of time. Then I decided that 1) there was improvement but 2) it could not be linked to the CBT, so I stopped seeing the therapist.

I can definitely report there's a strong correlation between thinking positive, evidence-ignoring thoughts and general well-being, over both small and large time-scales. But you already know that :-) I have no data as to causation.