With just 2 days to see Lisbon, GreatStay's was a great place to stay. The location was perfect for me, I could walk pretty much everywhere I wanted to go. The room was bigger than I expected, and the bed was quite comfortable. If you are a light sleeper, the noise from the street (mostly trams and buses) may keep you up, and you should ask for a room that does not face the street (I liked overlooking the street and the noise did not bother me).