I booked CityView tour based on our excellent experience with the same company in Key West. Unfortunately, CityView Boston was not nearly as good. The stops are not marked in any way (I was told that the city prohibits signage) which made it very, very difficult to figure out where to catch a trolley. We had 3 different guides over the course of the day and none of them were above average. One guide chattered on & on, but spoke very little about the actual sights we were passing or the history of Boston. The second guide had so little personality, he bordered on unpleasant. The third guide was probably the best of the three but spoke so softly that it was very difficult to hear him. The harbor cruise was excellent. The cruise guide, Devin (?), was entertaining and very knowledgeable.