Great little studio flat, the description of being tiny is accurate, but if you don't plan to spend much time at home and only need a bed, kitchen and bathroom for a city break then it's perfect!
It is a little far away from Lisbon's main attractions, but there is a bus stop 2 minutes away and the main tram route is about 10 minutes walk.
Check-in was very easy, even though the host was not able to meet me, and he was very helpful throughout my stay!