Carlo's apartment is 20-25 minutes within walking distance from Bari Centrale. The neighbourhood is not touristy, it's calm, there are mainly residential buildings, so not much to see, but you can experience the life of everyday Italins - kids playing in the playgrounds in the afternoon and at night, their parents talking with each other, buying sandwiches and sodas from a bus nearby, elderly people having their coffees on the benches in the mornings. We enjoyed having breakfast at Bar Moderno.
We stayed in the double room with private bathroom. It was decent. It was in no way dirty, but it could have been cleaner (especially the shower cabin). It gets hot even with the window wide open, so I recommend that Carlo installs A/C. We stayed there in May, so I could only imagine what it's like in July and August. The Wi-Fi connection is strong. Carlo was polite and was a nice host. I'd say it's okay for the price.