We were 3 adults staying 1 night at Mario's place.
The place is conform with the description : the location is great right next to the metro station, the flat is bright and well equipped (towels, sheets, hair dryer, shampoo, etc). It was very easy to get the keys and Mario was very responsive.
For you to know, the breakfast is NOT FREE as mentioned in some language versions of the announce. It costs 2,5 euros per person and includes one hot drink, one cold drink, one piece of cheese, one piece of bread and some butter and jam.
Cheers!