Don’t consider the 4 stars as a critique of the guide. I am not sure how this tour could be made better. Antonio is pleasant, interested in pleasing the guest and his car used for transportation was very comfortable. Sometimes it is just difficult to make a tour, especially in 4 hours, of a big city interesting, and that is the reason for the 4 stars. The tour just lacked some depth, some feeling or emotion, and probably was due to trying to show us as much as possible in 4 hours. Personally, I would have preferred less travel, and a day of showing us why he loves the city with fewer stops.