This cruise was cheaper than the AIA architectural cruise, and it should have been. We were packed on the boat, and couldn't even sit on the upper deck without a pricier ticket (that I wasn't even aware of when I booked the cruise). The narrator spoke slowly, and often stopped to tell people to move away from the windows. To get an unobstructed view of things, you had to go out a heavy door to the front small outer deck - and there were so many people crowded out there, trying to get a good view, that I was often stuck behind 10 or more people! The narrated script is informative, but not nearly as interesting or in-depth as the architectural tourboat - and Circle Line doesn't encourage questions from the audience.