My friend and I stayed at Paulo’s place from Sunday to Friday.
The apartment is small and clean and includes all the basic nessecities; a small kitchen, a proper bathroom and WiFi etc.
One should be aware that the apartment is located in the old district of Lisboa. This means that the apartment has a low ceiling and only to small windows.
We really liked the authentic atmosphere, however it was difficult to ventilate the apartment properly - this could be a problem, if you visit during summertime (although there is a vent in the apartment).
There is one major downside to the apartment - the neighbors! Just across the street is a music school, where the student practice clarinet, trumpet etc. from 8.00 AM to 7.00 PM. The street is very narrow, so it becomes pretty noisy. And from the sound of it, the students are not very good at all!!!
Luckily there is a lot to see and visit in Lisbon, so we were only home 1-2 hours in the late afternoon - but still very annoying.
If you are looking for a comfortable place to stay with a friend, this apartment is well suited. I would probably choose something else for a romantic getaway.