The location was great for sightseeing and the apartment was comfortable. Very handy that it has 2 bathrooms. The checkin was easy, everything was super clean and we really enjoyed the stay.
You may consider bringing earplugs as the walls are paper thin and you can hear the neighbors- this seems a common thing with many houses in Lisabon though.
Note that there is no possibility to leave/ store your luggage in the apartment on the checkout day. We were referred to underground lockers - the nearest one is at Martin Moriz square and you need to pay cash. Unfortunately these were fully booked and we ended up strolling with suitcases searching for lockers elsewhere.