We have just returned from a 5 night stay here and had a wonderful time. The apartment is really lovely, bright, tastefully decorated and very, very spacious. We were a group of 11 and had plenty of room and enough bathrooms to not feel squashed.
Daniel couldn't have been more helpful ahead of our trip; organising transfers, arranging a breakfast hamper so we didn't have to rush out to supermarket on our first morning and providing recommendations.
The apartment location is great - traditional restaurant/bar downstairs, cafe/bakery and a shop opposite. Short walk to metro and towards town.
The only drawback for us was the noise at night. At end of July, Lisbon was extremely hot and there is no air con in the apartment. This alone is slightly uncomfortable and could be improved but it also meant we had to open all of the windows. We are not fussy people and I have stayed in many hostels etc but would not underestimate the noise - although a quiet road generally it seemed to echo during the night and we did struggle to sleep. We were always awake before 7am. Waste disposal for glass of all things came to outside of the apartment at all hours (2am, 6am) almost every night - flashing beeping and pouring...it felt like it was in the room. I know this is not the hosts fault (they were lovely and everything very well prepared) but I do think it is important for groups, especially families to consider as it did unfortunately impact us.