All the reviews are true! Marco is the friendliest and most thoughtful host. He is easy to reach and will reach out to you to make sure you don't need anything. We had the most delicious gelato with him and he even took us into the near by fish market when we showed interest.
His apartment is most conveniently located near Ortgygia, where you want to be. Walking takes about 10- 15 minutes and driving about five. Street parking is plentiful and the apartment is well-appointed.