I stayed for one night at Oscar's place, so I could get to the airport easily. It was a pleasant stay. If you're looking for somewhere that's conveniently connected to the metro and not too far from Rossio, Bairo Alto- for me these felt like they were within a walking distance, also by cab, you're about 15 minutes away from the airport. My only qualm is the stairs, the apartment is on the 3rd floor and boy was it hard carrying my luggage up there and luckily the other tenants in the apartment wer kind enough to help me. Kitchen is well equipped, living room is cozy.