We had a great stay in Lisbon - we loved the apartment and the location. The famous Pink Street is literally just around the corner. We arrived on a Saturday night at around midnight and the bars near the Pink Street were overflowing with people. We were worried about the noise in the apartment - we didn't need to. There was no noise in the apartment. We in fact freshened up and came back downstairs to have a few drinks and had a great time. The apartment and the building was well-secured that we left kids back in the apartment.
It is about 25 minutes, ~15 Euro taxiride from the airport. The area is safe, Time Out market is nearby. The paid street parking is possible, but usually not available. A note - the street parking is free on Sundays and from 1 am to 9 am on weekdays. All tourist places are pretty walkable.
Most of all, the host was very communicative and accommodating given our long travel delays. She arranged for a late check-in after midnight and answered our questions very quickly when we were there. We definitely recommend this apartment and will stay here again in a heartbeat the next time we are in Lisbon.