I agree with the other reviewers that the response times were always friendly, helpful and also pro-active. The host Pietro does everything possible to make the visit easy and enjoyable. I also agree that the location is a great advantage for reaching other parts of the city either by foot or with public transportation. A further advantage is loads of shops nearby for buying food and other basics. For my purposes the flat was very suitable.
My only, fairly minor reservations would be as follows. First, the flat may not be ideal for light sleepers. One side of the building is on a main road with heavy traffic. The other side overlooks an alley which is normally quiet, but does seem to attract loiterers late at night, who can be noisy (shouting, singing, etc.), so I did at times need earplugs. Second, although some reviewers note positive experiences with up to four guests, that might not work for everyone. I would happily stay with one or possibly others, but, given the relatively small size of the total space, four might be difficult unless they all get along extremely well.