Benedetta's place is very well located, it's 10 minutes walk from the train station, which you can connect to all nearby attractions like Polignano mare or Alberobello and the airport. Also just 5 minutes walk to old town and city center.
Place is easily enough for 4 people, with the help of downstairs couch, which turns to a pull away bed.
I would say place is reasonably clean, however in our stay, there were some personal hygiene stuff left around the place. We found a razor and a toothbrush in random places. I guess they were just forgotten, however there were no dirty surfaces, kitchen and the bathroom surfaces were also clean.
There were enough towels, but just a bit short on toilet paper.
AC is working well for the whole place.
Benedetta unfortunately does not speak English. However, she either uses translate tools or help of her friends. We had no issues with that.