I second the review that complained about lack of availability on weekends. My sister came to visit me from overseas and the only time I would be able to go out with them is on a weekend. Guess what, all their weekends are booked for the next 3 months! Who goes on a full day boat trip during the week ? I have contacted Groupon and asked for a refund. They better refund me my money back or I am disputing the charge with my credit card company! Never buy a Groupon with this company unless you plan on going on a weekday or can plan a boat trip 3 months in advance!