I was using the biggest room in the very nice apartment (old house, very high celling) which has everything you need to leave. It is perfect for one or two persons! Everything was "nearly" everywhere very clean and I wish I could get for 1 months more towels a week and also get washing powder because I had to buy a 2l bottle which I used 3-4 times for washing.
My big room was very nice with 2 big widows BUT very, very noisy because of the street (police, ambulance, fireman-cars - very, very often during the night/evening). I could hear even the underground and the neighbours in the house where loud. I spend all the day in the city but in the night I had a lot of sleepless nights and I am actually used to a big city... Closing all the windows was not helping at all and it was too hot in the room. There is a fan & an air condition machine but this can not be used (?) - the owner told me the fuse would not work because the air condition machine is too big... Old house with old electricity wires/fuse...
The location is perfect for traveling. There is everything near: supermarkets & cheap supermarkets, bank, pharmacy, underground/bus station, food restaurants every corner...
My personal conclusion: good place but too loud. I want to visit Lisbon again by I would try to find a quieter place to stay.