We (group of 4 adults) really enjoyed our stay in Filippo's apartment. Although it's not in the centre of Bari, it's close to both the airport and a train line that takes you to the city centre in 10 minutes for only EUR 1.10. There is a small supermarket only 2 minutes so you can stock up. We really enjoyed the two terraces and spent every evening on them.
Filippo gave us great tips on where to eat locally (there are a number of good restaurants and some lovely bakeries nearby) and was an outstanding host throughout the trip, helping us to book taxis and responding quickly to any questions we had. I wouldn't hesitate to book this apartment again.