The location of this property is good. Many tourist attractions are within easy or at least reasonable walking distance, including the Lisbon cathedral, the S. Jorgé castle, the Praça do Comerércio. Also, there's a very adequate grocery store nearby, as well as a laundromat.
The unit itself is quite small, and when the couch is made into a bed, it will take up a large proportion of the space. However, it's easy to set up and take down, and a very helpful video is provided when check-in time approaches.
And Nuno is great at communicating with guests. He provided me with everything I needed to know and was quick to give me helpful directions when I was confused on getting the unit's door open.