The apartment is a shared accommodation with several rooms in a beautiful old building.
During my stay several rooms were booked by other guests (there are 6 or 7 other rooms?), but this was not a big problem as the apartment has 2 bathrooms with showers & one additional bathroom (without a shower).
There is a shared kitchen with a washing machine that can be used as well.
The accommodation is very clean and every second day someone came to clean it.
The communication and check in with Alinea, the host, was smooth. Upon check in, she was there to explain everything and to hand over the keys.
I definitely can recommend this accommodation to anyone who is into the "hostel" experience. Probably not recommended for people who are sensitive to other people (during my stay, there was a lady who asked me to switch off the light in the hallway in the evening when I had to cross the big accommodation from one end to another to get to the bathroom...).
I really enjoyed staying at Alinea's place, and would book this accommodation myself again should I come to Lisbon in future!
Thanks Alinea!