We had a really good stay in Ricardo's apartment, and enjoyed that it wasn't in the most busy neighborhood, nor the area for nightlife. Ricardo is a good host, replying quickly to emails and is most helpful.
Ricardo's mother met us when we arrived and showed us around the apartment with great enthusiasm, and even gave us cards that we could refill to use on the bus and trams. She was very friendly, and explained where to find stores and buses in the neighborhood.
The apartment was well equipped with what we needed for our five days in Lisbon, and with a grocery store within walking distance, we made ourselves breakfast in the apartment's kitchen.
A heads up if you need a quiet night's rest. The Lisbon airport is close to the city, which means all the airplanes pass over the city in low altitude. So between 5 in the morning until 12 at night you hear the jet engines over the roof tops. So bring ear plugs.
We would choose this apartment again next time we come to Lisbon, it was a very good experience.
Muito obrigado!