The location is perfect. First i think that the city is the best place to stay if you choose to visit Puglia and second this apartment is the best Bari option that you can have. It is in the middle of the things that u should visit(another city or place). Whenever u decide to go somewhere it is from 10 to 20min by foot. The main station Bari centrale is so close, from here you can go to airport, to Polignano a Mare, Monopoli...
And about the host, they are loveable. Nice and easy communication, very helpfull and careness