I didn't meet Mauro in person as he was away on vacations or something, but he had his best friend come over to check us in, and she was amazing! Very receptive, very helpful and even taught us some history about Palermo, its colonizers and the mafia.
The apartment is very central, spacious and clean. It overlooks one of Palermo's main streets, even though the entrance door is in a little "viccolo".
Can't think of a better location in town!