We showed up at the top of the stairs with 4 other people at the time indicated on the web site and we waited for 20 minutes for a guide to appear . It was a No Show both on Friday and Saturday . We had asked the tourist Information Office nearby if they knew about this organization and the answer was that sometimes a guide shows up , but that they were not very reliable .
If this group only offers its services during the summer season , it should indicate it on its website and advise the tourist information office about its schedule ! Not only was it a loss of our time but also we missed the opportunity to visit this beautiful city with another group !