Margarida and Pedro are very helpful and it was lovely to meet them. The flat is spacious and clean, with good wifi and a great shower. The kitchen seemed well-equipped (we didn't use it) although lacks a washing machine. During our stay there was some noise from local building works, and in the evenings people from the hostel are in the garden at the back, although they don't stay there late.
The neighbourhood is typical Lisbon, and has a supermarket, cafe and a couple of good restaurants close at hand. It's 6/7 minutes to either of two Metro stations or 20-30 minutes walk to any of the visitor destinations.