We had to wait for 30 minutes in front of the airbnb until someone showed up. We had already tried to communicate 5 minutes after the agreed time, but nobody ever answered to the message (mobile number didn't work).
Still, we loved the appartment. It has a great location and style and we enjoyed our time in Bari.
If you plan on cooking maybe take some essentials; we bought some olive oil, salt and coffee that we left in the apartment for future guests to use.