STOP LOOKING - THIS IS WHERE YOU WANT TO STAY!
My boyfriend and I just returned from our 2-week trip to Europe and Lisbon was our first (and most favorite) stop. It is always a little touch-and-go arriving in a new country, and I was a bit nervous about not speaking a WORD of Portuguese and knowing next-to-nothing about the city - but, do not stress. Henrique and Pedro speak perfect English and were the most accommodating hosts ever -- upon booking (about a month early) they got in touch with me via WhatsApp and sent emails with recommendations for things to do/see/eat in the city. They were super-helpful when we decided to extend our stay 2 extra days and modify the reservation. They were above-and-beyond helpful upon our arrival - they asked for our flight info (to track us) and gave specific instructions on how to arrive from the airport, and since we couldn't yet get into the flat, Henry met us at their office and stowed our luggage (and later brought it to our flat) for us! He gave us a map of the city and a plethora of ideas and tips for things to do and which direction to walk in - and also walked with us to our first scenic overlook of Lisbon. A few days into our trip they texted to check on us and also made reservations for us to see a Fado show. It was like meeting a friend in a new city who could show you around - so helpful every step of the way.
The flat itself was gorgeous - updated/stylish and perfect for a couple. I imagine all of their listings are the same quality. My bf and I were able to do laundry one day which was helpful and we made coffee in their easy Nespresso (?) machine each morning. The views from this apartment are gorgeous. My bf walked to a bakery 5 min away twice to bring back breakfast - also there is a little bar/restaurant like two doors down- super convenient. Other restaurants/groceries are also close by. We walked into town sometimes but also Uber'd to a lot in the city due to the hills but that was so easy in Lisbon; I think if we had stayed closer to the "downtown" we would have missed out on the amazing experience up in the Graca neighborhood. I would stay at this same flat again in a heartbeat.
If this particular place doesn't suit your needs, one of their other 10 (?) properties probably will. This is their business and they take it seriously -- do yourself a favor and stay with them :)