The tour itself was great.
My only complaint is about Viator's 'phone operators who are language-challenged. I called on Monday Feb 24 at 10:30. All I needed was to give my credit card number and get a ticket confirmation. I was at a resort just 2.6 miles away from the marina, an 8 minute journey. But the Viator operator, with a heavy southeast Asian accent, wasted a lot of time asking "Which country issued your credit card?", "What is the country code for your phone number?" etc. It took her so long - then to have her spell the street name - 86 H-E-L-M-S-M-A-N in her l/t mixed up accent was very hard - I could not go that day, when the temperature reached near 70 deg F. I had to go Friday 2/28 when it was 45-50 F and freezing out in the boat.