I had a day-long stopover in Lisbon, arriving early one morning and leaving early the next morning. Isabel’s place was perfect for this, as it’s a short walk from both the airport and metro. She welcomed me at the airport and walked me to her place and allowed me to drop my bags in the morning, which was nice for going exploring. When I was done I came back in the evening and her place allowed me to be close to the airport, making things easier in the morning. The room was clean and cozy, good for the price.
The airport has a luggage storage facility, so if you’re carrying heavy bags on a stopover you could consider paying a few euro to leave them instead of taking them with you to her place. I did this and it was very convenient.