Booked for JFK tour, but found out we were on Dallas tour by computer glitch. Once this was recognised, guide did a great job of rectifying, and was very helpful and informative. The only other thing was that the hotel concierge told us that there would be a hotel pickup, but apparently this is not always available, despite what their webpage says. This is probably worth checking before you book. Overall we enjoyed the experience despite these issues, largely due to the positive and cheerful attitude of the guide!