I can't recommend this place enough, it suited my every need. Located in a pleasant and safe feeling working class neighborhood it was only a ten minute walk over to the river. Conveniently, though I didn't need it, that walk takes over the railroad station stop for the neighborhood. And the Metro stop, which you can take only two stops from the airport. The bed was invitingly comfortable and there is a nice balcony where I was invited to smoke, with a view of the street below. Busses came down the street but I don't know where they go and it wasn't really noisy.
There's a very handy elevator to the third floor or you can walk down the stairs with beautiful marble handrails.
Shower was clean with plenty of water and towels.
I didn't really make use of the full kitchen except to get a drink of water.
I was made to feel completely at home, and I even shared the place with another renter, a young man from Porto who was using another room. He spoke perfect English and we shared a bottle of wine on our adjoining balcony that he helped me buy at a local food market.
My only complaint was that I sadly don't speak Portuguese, so really wasn't able to talk with them as I would liked in order to get to know them.
Bravo ! I loved this place !