I really enjoyed my stay at this place.
As other people mentioned before this accommodation is not suitable for people who are good with walking/disabilities as the stairs are super steep.
Other than that it’s the perfect place to discover the city.
Also important to mention, that even the taxi driver didn’t know the address so if you arrive name the museum do fado as adress as you can’t reach the apartment by car at all (you have to take a staircase).
The appartment was very clean but some details could be fixed (bathroom doorhandle, Sofa would need a deep cleaning, little mold spot in the kitchen).
Still I would absolutely recommend this appartment to everyone who wants to see the old and authentic part of Lissabon.