The apartment is very light and clean, and it is located in a nice neighborhood. Mind you, it is a bit small (although the ceilings are high, which is pleasant) so you might stumble on occasion.
The main problem we found was the bath. There is no shower, and no curtains, just a bathtub, so you are faced with the option of taking a long bath (impractical if there are 4 people in the house, one bathroom, and you want to go out soon to explore the city) or a very uncomfortable sitting-on-the-edge-the-tub-and-splashing-water-on-yourself type of bath. Also, water was cold after 2 people bathed.
It says in the description that two individual beds instead of the living room couch are available but they charge you and extra 100 euros for that. We didn't take it. The couch is not uncomfortable.
Alessio was helpful enough. The first day we were introduced to a lady who told us that visits were not allowed, in rather rude terms, but Alessio was very helpful and we had no complaints about him.
All in all, it was a nice experience. The bath issue seems to be easy to solve by the owners.