My family and I were visiting from NYC for a weekend in Lisbon and overall we enjoyed our stay in the apartment. It was clean and cozy with comfortable beds, a sitting area, kitchen and balcony. The upstairs bedroom is a loft; the ceilings are low and angled so you must bend over when moving around, getting dressed, etc. It is beautiful in the morning with the sun streaming in. The view from the balcony is beautiful – it overlooks Alfalma and the ocean, and sunrise/sunsets were gorgeous. We were able to fit 3 people seated on the balcony but it is not large. The main level has relatively low ceilings and you may have to duck going through the doorway, but you can otherwise stand up fine.
Check in and accessing the key was straightforward but opening the locks take a bit of time to figure out. The stairs to the apartment are narrow, steep and loop around several times. This was fine for us but if you are disabled or have large luggage it may be hard to get up.
The neighborhood itself is so charming and has lots of beautiful, winding streets with pastelarias, bars and some restaurants. It is easy to get lost but that is the beauty of Alfalma! However, the streets are also steep and taxis/Ubers cannot get to some streets so if you have trouble walking it may be difficult.
We believe there may have been a cat previously in the apartment as both my mom and I are very allergic and were sneezing whenever we sat on the couch. The apartment also does not have smoke detectors or carbon monoxide detectors as was indicated on the profile. My dad is a firefighter so he had lots of anxiety about this  although this is apparently typical for Portugal. Monica responded within a few hours to every message and did her best to accommodate.
Overall, we thought the apartment was nice to stay for a weekend as long as you know what to expect.