I've found that there's a number people who are afraid to come out and say they didn't like Cuba, it's a very unpopular opinion. I spent two weeks there as part of a 6 month trip through North and Central America, and before I went, everyone said they loved it. Since then I've found I've spoken to two or three people who have said they were glad I told them I didn't like Cuba because they didn't either, but everyone else loves it. Obviously this is a small sample size, but I found it interesting.
Personally I thought that Viñales particularly, and Havana to a lesser extent, to be the most touristy places I've ever been. Of the three main streets in Viñales, almost every building was either a Casa Particular or a restaurant catering to tourists. In downtown Havana, the number of Canadians/Australias/Kiwi's/Europeans was incredible, more so than anywhere else I went in Central America.
Almost every daily activity was more difficult in Cuba than anywhere else I went (probably because of the embargo) - restaurants and supermarkets were constantly out of stock, exchanging money was an hour long ordeal...
That being said, if I had my time again, there's nothing I'd change, it was definitely a unique experience