We had a wonderful stay at Caramanna. It is not just an apartment, but a complete guesthouse. Very spacious and stylish with nice terraces to enjoy the views. Elena was very helpful and even provided us with the necessary groceries.
Just be sure that, coming form Bari, you do not take the first sign Castellano Grotto but drive on to Monopoli-Castellano Grotto as explained by Elena. We took the wrong exit, late at night which wasn't very practical.
Puglia has a nice landscape and enough interesting things to see and do and at the end of the day you take a dive in the sea.