We send out a feedback survey a few days after the workshop which includes the question "0 to 10, are you glad you came?" The average response to that question is 9.3.

I've seen CFAR talk about this before, and I don't view it as strong evidence that CFAR is valuable.

• If people pay a lot of money for something that's not worth it, we'd expect them to rate it as valuable by the principle of cognitive dissonance.
• If people rate something as valuable, is it because it improved their lives, or because it made them feel good?

For these ratings to be meaningful, I'd like to see something like a control workshop where CFAR asks people to pay $3900 and then teaches them a bunch of techniques that are known to be useless but still sound cool, and then ask them to rate their experience. Obviously this is both unethical and impractical, so I don't suggest actually doing this. Perhaps "derpy self-improvement" workshops can serve as a control?