Ricardo was a nice host: he came before the check-in hour to give us the keys and told us several tips to visit and to eat in Lisbon.
The flat is composed of three rooms for visitors (he doesn't live in) and the guests were very calm and quiet when we stayed. Our room (the upper one) was very nice with a beautiful view on Lisbon. All the flat is cool and well decorated. The bathroom - built on the outdoor terrace - is maybe very small but clean, with also a view on the famous Lisbon's bridge.