My husband, one year old daughter and I stayed at the apartment for four weeks in February and March. The apartment has many positives and also some negatives, that I will describe below, but overall we very much enjoyed our stay. The people managing the apartment and the owner are all very nice and responsive and did their best to resolve any issues that arose and answer any questions that we had.
The apartment is overall very nice and spacious with lots of storage. Note however, that the second bedroom is very small and has no storage other than the drawers under the pull-out bed. Fine if you are traveling with one or two children, but maybe not very convenient for adults. It is also worth overstating that the second bathroom is a half-bath. The only shower is in the master bathroom. Fine if you are traveling with family, but may not be ideal for less close-knit groups. Bathrooms could use more places to hang/dry towels and a shower caddy. The kitchen is very well equipped. The beds and sofa are very comfortable, however some decorative and regular pillows seemed to be rather worn and could be replaced. Crib was not listed in the amenities, but was provided upon request. Wifi connection is good, it handled very well both streaming and Zoom calls.
There is only one air-conditioning unit in the apartment which is in the living-room. This meant that despite a portable heater provided by the hosts, the apartment was rather cold during our off-season stay. As the apartment is on the ground floor, the floors were especially chilly. The apartment was also rather damp when we arrived (probably had not been heated for some time) and the drainage in the master bathroom emitted sewage odor (a quirk of an old building). The smell is probably not that big of an issue when you can leave the bathroom or bedroom window open during warmer weather.
Another quirk is the electrical system. It doesn't handle many small appliances at the same time. However, this has been the case in every apartment we have stayed in Portugal. You can switch the electricity back on from within the apartment. Not having to run around the house in your robe (that has happened in other places) is definitely a silver lining.
The apartment is at a corner of a relatively quiet street. The bedroom windows face the street, but that section is pedestrian with only an occasional car driving by right beneath the windows. If you are not a very light sleeper, you should sleep like a baby with the blinds down and windows closed.The apartment itself was overall quiet, but there was a lot of construction going on in the immediate neighborhood, so the patio was rather noisy during the day. However, that can be said just about any place in Lisbon right now, as there is a lot of construction going on all over the city.
Despite the construction, we absolutely loved the location of the apartment. Lapa is a fairly quiet area with a residential feel. There are many small grocery stores as well as nice cafes and restaurants near by. The Santos (some of our favorite cafes/restaurants were there) as well as the Bairro Alto districts are just a short walk away, city center can be easily reached by bus or tram but is also walkable. A hidden gem is the statue garden of the National Museum of Ancient Art which is a 5 min walk from the apartment. You can access it when you visit the restaurant of the museum.