We loved almost everything about the Wind Surf and we would recommend it to anyone who does not suffer a food allergy or intolerance. But for the celiac passenger in particular we strongly recommend looking elsewhere for a cruise. If you don't have allergies or intolerances you will love the casual atmosphere, the friendly crew members, and the fabulous water activities at the back of the boat.
Unfortunately several in our party have celiac disease/gluten intolerance. One family member is type 1 diabetic with celiac and for him it is essential not to be in an environment where he might be "glutened" (and he is very careful as a result). There were many problems with how gf was handled for our group on this cruise. First problem is that much of the food is served buffet style and there is an apparent lack of understanding how this presentation can easily cause cross contamination.
On the first day at lunch we asked for some cold cuts and cheese to be brought out for 3 passengers who were gf and they brought out two thin slices of cheese, and two thin slices of meat. That set the tone (we were expected to use the buffet) but unfortunately there were other issues as well, such as learning after the fact that certain grilled meats had been marinated in something that may or may not have had soy sauce (which some did not seem to realize usually contains wheat -- particularly with the brand they referred to which was Kikkoman).