This is the best location for an authentic Lisbon experience! If you like the view over Alfama and the river with your morning coffee - this is it. The apartment itself is very nice, really clean and neat. Is big enough and has everything you need even if you stay longer (washing machine, etc...). Right down the stairs from the apartment you will find nice local restaurants and bars. And the hosts, Paulo and his sister were super friendly and quick to answer every question.
I have been in Lisbon many times but this is by far the best and the most authentic location.