Angelo is a great host, ready to help and react immediately whenever we needed anything, despite the fact that we didn't speak Italian and Angelo didn't speak English. :)
Angelo's apartment is located very close to the old town but in a very quiet street. It takes about 5-6 min to walk to Ostuni's main attractions. The apartment is new, decorated in a pretty way, with all the needed equipment. It was pretty cool inside, despite July and the heat outside, so we didn't have to keep the air-conditioning on all the time. The only thing that was sort of uncomfortable was the musty smell in the apartment and the water pump/heater that was very noisy when pumping/heating water. Also make a note on the fact that there is no wifi in the apartment.
Other than that we recommend the place and we loved Ostuni! The town is amazing and a must to stay for a few nights.