The flat is situated in the very center of Lisboa, right between the main neighbourhoods and close to the Tejo. Metro and Ferry are really close by.
Everything we needed was available in the flat, even for kids. The welcome was very friendly.
To me there were too many tourists in the area, but that is the case of most of downtown Lisboa anyway. Also it is quite noisy because of the traffic so it is best to bring earbuds if you're sensitive.
To wrap it up it was a very good experience.