We spent 3 nights in the apartment, 4 adults and a child.
We loved the experience. The place is perfectly located, a great spot from which to explore the city walking, and also with easy access to taxi and other public transportation. It's close to everything, and yet silent at night.
The host is simply outstanding. All our communication was responded almost in real time before our arrival and during our stay. They have a booklet prepared in Portuguese and English with all major insider tips for a great Lisbon trip.
Place is spotless, and has some amenities one would expect at a hotel, and yet it feels like home.
Looking forward to going back!