We enjoyed our stay in the apartment very much! It is a bright and clean space and has everything you need for a short city trip or a (longer) vacation.
Communication was excellent before and upon arrival! We were even personally welcomed by Teresa who brought us to the apartment (we arrived by bus) and showed us around. She also gave us a lot of information about Lisbon, which was very helpful.
The only downside for us were the busses in the street, which make a lot of noise (if you have the windows opened) when riding up the hill.
Besides that a total recommendation!