Nuno and Susana's apartment is exactly as advertised. Great central location for exploring all the best sights in Lisbon. Easy walking distance to many vibrant and historical neighborhoods, the Metro and trains from Rossio for day trips to Sintra, etc.
As an Airbnb co-host myself, I appreciated the spotlessly clean and well-equipped apartment. It is located in an "urban" setting, so some noise is to be expected, primarily if you are going to keep the windows open. This wasn't an issue at all for me, but something to keep in mind if you happen to be a very light sleeper. Susana's mother Cristina greeted me on arrival to give me an apartment tour and provide helpful instructions on how to use the laundry machine and other appliances. I didn't get to meet Nuno or Susana, but they were in frequent contact during my stay and answered any inquiries in a very timely manner.
I highly recommend their apartment as a home base in beautiful Lisbon. One tip, the condo complex is on the plaza by the Metro station, but not directly next to the main hotel. It is about half way up the plaza, on the right side of the plaza as you look at the hotel from the Metro station. To the right of an Asian market and food court. The Airbnb is in the building behind the building that faces the plaza.