The apartment is amazing, almost like a piece of art. Sérgio probably also put in a lot of energy to provide everything needed for a trip to Lisbon. The kitchen is very well equipped. Other AirBnBers can learn from him!
There are only 2 things that bothered me:
1. The door can only be opened with the key, even from the inside. In case of an emergency that can become quite dangerous if you can't find the key in a panic. This surprised me because otherwise there are lots of safety features (fire extinguisher, fire blanket and first aid kit) in the apartment.
2. The bed is very uncomfortable because of the thin mattress. You can feel every single piece of wood underneath it.
Overall excellent value for the money, though.