Excellent tour around the harbor. Starts at 1 Long Warf (my tour was at dock 2), heads along South Boston, then turns and heads up to Constitution Warf to view historic boats, then turns and comes back. Live narrator that adds history, info and jokes can be heard easily on all viewing levels. 3 levels to view from that you can switch back and forth on anytime - top (no coverage, but the least obstructed), middle (uncovered on back and inside in front, where narrator stood), lower level (all covered with concessions, not many people stayed down there). Bathrooms on board - old, but suffice. Usually it's more windy on the water, so keep that in mind if it is cold. The inside sections were fine (I went on a 45 degree day and was on the top level mostly). About an hour. I really enjoyed it. Several time slots to choose from. It was hard to find weekday tours in March for other companies. Seems as though May starts more of the other tours in Boston. I gather this specific company/boat goes out all year. I'd definitely recommmed it.