We stayed at Casa na Bica for a couple of days and we really enjoyed it.
The apartment was clean, very spacious, bright and exactly as described; the location was safe and very close to almost everything we wanted. We also enjoyed the view from the window of the Ascensor da Bica :-).
Our host, José was very prompt and kind to provide us some useful tips.
We loved our stay in Casa na Bica and we would reccomend it and book it again next time we visit Lisbon.