OK. It s a company that runs this place. Upon arrival we had to pay 30€ in cash for so called final cleaning without any receipt. We stayed six night and asked for another towel and toilet paper by email (which is the only way to get in contact with the company) but were answered that it would only be given to us after a new payment. There were no cleaning utilities in the flat so we even couldn't clean even just the table. There is no water heater, so you cook water in a pot without lid on the gas stove after you went to buy a lighter as there is none in the house. The kitchen is very poorly equipped and you will find it very hard to prepare anything. There is a hip bath and no shower curtain in the tiny bathroom so you will step into water all day or night long if you enter the bathroom after a shower, which is a problem in autumn time. And again: nothing there to clean or dry the house. I think the place is OK for one or two nights if you don't have big expectations.
Last time we visited Napoli we stayed in a hotel near Toledo Street and payed 20 euro more per night - now we know it was definitely worth it.