This is a very spacious apartment that worked fairly well for our group of 3 couples. It is located about 1.5 miles from downtown and only steps away from a great marketplace for food and drink. Taxi/Uber rides are about 15€ to the airport and less to Rossio train station
Trains to Sintra were 6€.
Our host patiently waited for us during our arrival, which was before the typical check-in. Communication was excellent. (Note: on one link the address automatically populated to building number 12. It is number 20, just to the rightof Pizza by the Slice).
The apartment was comfortable though somewhat sparse on supplies. We have communicated privately with the host as they are simple fixes. Hopefully they will be better for your arrival! Enjoy Lisbon!