Terrible experience. Buyer beware. Too few buses. LONG waits, and then no room on the buses and had to wait even longer. Bus drivers very curt and rude. Only 3 time slots available for Statue of Liberty ferry ride, and seats only offered on the lower level. Buses were filthy. No volume control for audio tour, very little information provided. Bought tickets for 72 hours, but only used them for a few hours on first day. Such a terrible experience we didn't even bother trying to use it any of the other days. Not a useful mode to transport around the city, completely unreliable. Can't think of anything nice to say about it.