This apartment was exactly what we needed, and then some! The space is comfortable, reasonably sized, recently renovated, and in an excellent location. When we arrived, we were met at the metro station by Rafaela from Courtesy, and she showed us how to get to the apartment. When we arrived, we found the Courtesy team had added many "extras" for our 4-month-old baby in addition to the cot and baby bath we expected, along with a small bottle of port wine and Portuguese pastries for us! We felt instantly welcome and at home.
During our stay, the Courtesy team checked in several times to make sure we were doing well and had what we needed for our daughter, and responded very quickly to the messages we sent to them.
As other reviewers have pointed out, the hot water tank is very small and it's impossible to have more than 2 warm showers in a row. There also isn't a porch or balcony, so if you want that, we suggest looking at one of the apartments Courtesy has in the same building (upper floors) or spend time on the patio of the restaurant next door! (the wifi even reaches that far if you want/need it)
Overall, we were very happy with our experience and were sad to leave. If we are ever back in Lisbon, we will stay with Courtesy again, and will definitely refer our friends to stay there too.