Everything went perfectly. Massimo's room is right next to the Botanical Garden in Naples and in a (relatively) quiet courtyard. The small room is very cleverly and tastefully furnished. Showering can get quite complicated though - helps if you're not 1m90 tall. For two or three days, the place is certainly an ideal place for exploring Napoli.
Massimo was courteous and always available and I regret that my Italian language skills are not sufficient to maintain a conversation.