I booked Diego's apartment on behalf of my mom, 2 aunts and 2 uncles. It was very easy to communicate with Diego and my family had a great stay in his apartment. The apartment is a little bit dark but the amazing terrace more than makes up for that and there is plenty of space for 5 grown ups.
Diego's housekeeper welcomed my family in the apartment. She was english so there was no problem with communication and she was very helpful. For example there was a problem with the wifi and she took care of it straight away.
Finally the neighborhood has a great selection of restaurants and bars and almost everything is in walking distance from the apartment. The restaurant just on the opposite side of the street is very nice.