Why spend ridiculous amounts on accommodation in Polignano? See an authentic town in action by staying in Conversano. Close enough to Polignano (and Bari, Alberobello, monopoli etc). Very welcoming.
Antonello's house is excellent. Very well located in the old town, an easy walk to all the restaurants and bars. Very clean, great facilities and the roof terrace is excellent.
If I had to find a negative, the bathroom is functional but small. If you're a big person, the shower compartment may be a tight fit.
Would I stay again? Yes!
Grazie, Antonello.