Sadly we weren't able to meet Yannis and Helene, but our experience at their apartment couldn't have been any better. They gave detailed instructions of how to get to the apartment from the port or airport and various maps of what's surrounding it. The apartment is right in the middle of all the popular tourist sites making it easy to walk and see them. The apartment was extremely clean and the balcony view was incredible. I highly suggest staying here and definitely will if we come back to Athens!