We stayed 3 people in the apartment for 3.5 months while studying in Lisbon for a semester. The apartment is very nice and spacious. The location is good, the metrostop is only a 5 minute walk and you have everything you need like grocery stores, farmacy and cafés in the area. The city centre is a 15-20 minute walk, but only a few stops with the metro.
We had a great stay, and Isa was extremely helpful everytime we had issues or questions. We had some electricity problems, but our hosts did everything they could to make it as comfortable as possible.