Klinika lets patients book physio appointments online. A clinic owner told me: "Please take away the option to choose the therapist. Patients all choose the same one and then complain she is full."
I thought it was the best feature we had. I made it a setting and turned it off for her clinic.
Her online bookings went up 22% in a month. I have since turned it off by default. Bookings are up 14% across 61 clinics.
I would never have found that in my analytics. It took a woman called Jitka telling me I was wrong.