We had a very nice stay in Ricardo's place. It was very clean. It is situated in the old town of Lisbon with a good "pasteleria" (= local tearoom) next door (handy to grab breakfast and drink a nice espresso to start the day). We got a warm welcome and a good explanation of a friend of Ricardo. We had no problems or issues during our stay. The mattress of the apartment's bed is not the best in the world.
Looking at price/quality, Ricardo's place is really awesome!