I had a great stay at Second House, Lisbon. I stayed here for 6 days.
The apartment is centrally located, on the main street and at a short walking distance from the city center.
There are a couple of metro stations at 5 minutes walk distance which makes the arrival from the airport very convenient.
It is clean and has a fully equipped kitchen.
A great bonus for a light sleeper like me is that it is facing the back of the main street so it's very quiet. I would definitely want to stay here again next time I visit Lisbon.