A number of reviewers said they learned important lessons in rationality from the exercise, seeing the reasoning that got it right contrasted to the reasoning that got it wrong. Did you?

What do you mean by 'right' here? Do you mean "made correct predictions about which decisions Eliezer would choose for Harry?" While exploring the solutions I am rather careful to keep evaluations of how practical, rational (and, I'll admit, "how awesome") a solution is completely distinct from predictions about which particular practical, rational and possibly awesome solution an author will choose. I tend to focus on the former far more because I hate guessing passwords.

I'll respond again when I've had a chance to do more than skim the chapter and evaluate the reasoning properly.