We spend very good time in Polignano and in Gianvito's apartment.
Nice place, clean, with everything needed during the vacation time (comfortable bed, clean bathroom, kitchen with refrigerator, air conditioning).
I liked very much the tiny private area outside (not a balcony, but still nice for eating breakfast or just hanging wet towels and swimsuites).
Very good location. Quiet, not in the crowdy center but close to it at the same time. 8 min to train station and 10 min to the beach.
Gianvito and Maria - very kind and helpful hosts. The react and reply very fast on every message send by airbnb.
I recommend both the hosts, The apartment and Polignano itself.