We stayed at Juan's place for 2 nights. 2 adults and a five-year-old and it was a perfect stay. As others have said, it is very close to almost everything in Lisbon and, importantly for us, it is on the flat part of the city, so we didn't need to traverse hills all the time. It's across the street from Martim Moniz with a beautiful view of the castle, but it is also quiet with great blinds and windows to keep the apartment quiet and dark (important when you want your little one to sleep). The apartment is very well equipped and comfortable with a kitchen with all the necessities, including tea and coffee. We also got some really great tips of where to go from Juan - the Time Out Market was my favorite, and some delicious pastries and wine. Thanks Juan!