This place is great, Raffaele and Serafina are lovely, very friendly, they gave us many tips and informations to enjoy Naples and its attractions. The house is in the heart of the historic city center and only 5 minutes from the metro station. The room is very clean and pleasant. Breakfast is amazing, full of delicious things. All the stuffs worked pretty well: wi-fi, tv, hot water, etc.
We strongly recommend Casa Mariella, especially for couples.