Had someone showed up to guide the 10 am tour this would have been rated excellent. After we finally contacted the tour operator, with the help of another guide, we were told of a problem caused by a strike.(the square was filled with other groups with tour guides) We was invited to join the afternoon tour, which we accepted. Turns out we were the only 2 people on the tour! The guide,Sonia, was outstanding, friendly, knowledgeable and interesting. The cake - not so good.