A very comfortable and charming apartment in a great location, close to most parts of town and with a lot of good restaurants in the neighbourhood. It has everything you need: good beds, a well equipped kitchen, not one but two bathrooms with great showers. A big plus is the storage locker room in the hallway where you can leave your luggage on the day of check-out (we had a late flight home so this was very convenient). Also, it's really quiet at night which is a great luxury for light sleepers. Everything else (the view, wifi, washing machine, lots of towels, soft bed linen) is perfect as well. The only downside I can think of is the fact there is no window (or other ventilation) in one of the bedrooms, so it can get a bit warm and stuffy at night. This can of course be fixed by leaving the door open.
We didn't meet Ana and Mariana but their instructions were very clear and self-check-in worked perfectly fine. We also appreciated their long (and good!) list with recommendations on everything from restaurants to sights. We booked a transfer from the airport with Miguel, who is very nice and helpful.
We have been to Lisbon many times and always had great places to stay - but this place was special. I would definitely like to stay here again on our next trip.