We love HOHO bus tours to get oriented in a new city. That was equally true for Edinburgh, especially in our jet lagged state! It was a perfect way to get the lay of the land and figure out the definite places we wanted to go in the following days. it was a recorded narration with headphones, which droned a little at various points, but that may well have been the exhaustion talking!
I cant leave a review because while we tried to change our day, we were never able to get through to the tour company because they do not answer their phones. Viator did their part immediately and even kept in contact with us, provided alternate numbers but we were never able to get them to answer our calls.