This is a phenomenal location: 3 to 5 minutes walk from the nearest metro station and bus stops. There are also a grocery store and food places. It is also not too far walking distance, 20 minutes to Bairro Alto, which I have walked multiple times and beyond, sometimes for fun, other times due to necessity (metro strike).
Inside the location, it is well furnished, with access to a shared kitchen and a washing machine. João and his family are kind and quick to respond when help is required. I highly recommend this location for your Lisbon visit.