The apartment was clean and comfortable, and surprisingly spacious given the location. As others have noted, this apartment is located up three flights of stairs, so keep this in mind when choosing for yourself if you have mobility limitations. I like to walk around cities to get a feel for them, but would caution others that the walk from the check in location to the apartment is very hilly and also includes many stairs, so if you do intend to walk with luggage plan accordingly. All of that said, the location of the apartment is quite nice, with many places to eat nearby and public transit options as well. Travel from this apartment to sight seeing spots was relatively simple and allowed me to see a lot in a convenient time frame.
It was cool during my stay and the apartment was a bit chilly, but the availability of an electric heater helped warm things right up. I did not take advantage of the kitchen to cook, personally, but did use the kettle. A washing machine is present for laundry needs. All in all, this apartment was exactly what I needed it to be- a clean and safe place to stay with a central location for seeing Lisbon.