One word summation: WOW. This is an amazing quiet oasis if you are exploring Lisbon.
Sandra's flat could not have been any more perfect for me and my work associate. We were in Lisbon for the WebSummit and it was so nice to have a "home" to come back to after some rather intense conference days. Big enough for two traveling for work to have your own space. Big enough for a family to sit around a dinning room table to share a meal.
Close to multiple metro stops. Cafes, restaurants, and grocery stores just steps away. A huge shopping mall within a 10 minute walk for those who like that sort of thing (just leave time to have our VAT forms filled out). Sunrise over Lisbon is a leisurely 10 minute walk and worth it. Grab a fresh pastry and cafe on your way back home. A 1/2 hour walk to "downtown" Lisboa for those who have time to be tourists. And many hotels near by if you are traveling with some who prefer a hotel experience. And if you don't like crowds this neighborhood is perfect for you.
Sandra and her husband were amazingly responsive, hospitable, and helpful -- not to mention all the sightseeing tips, which I will be saving more next trip to Lisbon. A great apartment for people traveling for business or a family on holiday or two couples traveling together. The whole experience was extremely positive with both the apartment and the hosts.
I do not not have a single complaint... except that I wish we could have stayed even longer. Do not hesitate to book your stay here.