We stayed 4 nights at Amélie and Marinho's place. Good location, plenty of nice restaurants around and quite easy to walk to the main sightseeing spots. Personally we haven't met either of the hosts but they were quite quick in responding our messages. The apartment was nice, the bathroom was a bit moldy with strong canalization smell but I guess that's a small disadvantage of the old houses. Apart from that, everything was fine and we enjoyed our stay in Lisbon.