For the most part, this is a perfectly nice place to stay. I would warn that the bedroom loft is pretty scary (it is not attached to the wall directly on two sides, so there are gaps in the floor), and that we found quite a few bugs (house flies, fruit flies, ants, and flying ants). I had thought that we would love using the patio, but in reality it's pretty hot up there in the direct sunlight; it would probably be nicer in the evening.
The good news is that there is a very comfortable bed and couch and a well-stocked kitchen. Also the team at Wonderful Italy was very helpful and responsive, and had an office where we could leave our luggage before checking in / after checking out.