The apartment is conveniently located in a quiet area not far from the main attractions. Night life in Bairrio Alto is only 15 minutes away on foot, the metro station Rato is not far but if you like walking everything is easy to reach. Late arrival was not a problem and Steven (Isabel's son) greeted us giving us a lot of useful tips on what to do and see in Lisbon. Communication with Isabel has always been super easy and she gave us a very detailed description on how to reach the apartment from the airport.
The apartment itselft is really nice, super clean, everything needed is available. I would just add a couple of hangers for coats to put them there and forget about them during your stay (when you come from a cold place) :)
Maybe the isolation is not perfect or we just had super noisy people staying above us.
All in all everything was good, the apartment is really nice, clean and Isabel and her family are really good hosts.