The tour itself was excellent: The scenery was lovely, the sites were interesting, historically important, and beautiful, and the tour guide gave historical context in excellent English. There was very fast WiFi on the bus if you wanted to look up additional information.
The most important thing to know is that though the tour may leave at 10, if you are not there by 9:30, they will call you repeatedly to ask if you're still coming and tell you to hurry. We had no idea we were expected to be there half an hour early, and it was uncomfortable to be told we were holding up the tour even though it was not yet 10. Once we arrived, the guide turned to the group seated in the bus and said "FINALLY" before opening into her information. And yet, we were seated on the bus by 9:58 and the bus started its engine and took off at 9:59 for a 10 am tour. Given that we had no idea to show up at 9:30, it was a very uncomfortable way to start the day. (While the ticket does say to be there at 9:30, we didn't receive our tickets until we had boarded the bus and the tour was booked by a third party, so that information was not available to us.)