The apartment is really as it seems from the pictures: large, comfortable, bright and clean. The neighborhood is quite fine, a mix of business offices and residential flats.
It is 10 minutes away from the metro stop and just a few stops off the city center, so you can exploit the large Lisbon Transportation network.
We loved the large living room, the 4 bedrooms, the plenty of bathrooms, the simple and new furniture and the air conditioning that allowed us to sleep also with closed windows (bedrooms lay on a street with traffic also during the night).
Check-in could have been a little better: the host was not there, we were welcomed by a woman that didn't speak english nor italian. With a call to the host she allowed us to let our luggage in the apartment before the time; the effective check-in was however half an hour late and with very few instructions about the house and the neighborood, and with no help to solve the first accomodation issues.
Despite this minor flaw, the house is very nice and we enjoyed our stay in Lisbon a lot.