Fantastic place - we were a family of 4 with 2 young kids under 6years old. We stayed for 6 nights. Location is just perfect. You can pretty much walk everywhere (castle, bairro alto, rossio etc) and you're pretty much in the heart of baixa just a minute or two from praca do commercio.
The apartment is really cute and spacious. Just like the pictures.
One of the best parts is the team who manages it and they were able answer any questions for us - and that too very quickly.
We would stay here again on the next trip to Lisbon.