This beautiful apartment for two must be one of the best in Lisbon. It is surrounded by good bars and eateries and has many places of interest on its doorstep. You can walk everywhere if you like hills but also the train station, Metro, buses and trams are very handy. The balcony was an absolute godsend - a cool refuge from the intense heat and lovely to breakfast on and sip wine (whenever). We found the apartment very comfortable. A word of warning - being from Yorkshire (UK) we're not used to AC but I suggest you shut all the windows and put the AC on at night because it can be very noisy into the early hours.
Going down the hill towards the station is a local gift shop doubling as a luggage storage facility. We were able to store our luggage safely and cheaply (pay at the shop) and spend our last full day bag-free. They also arranged a very reasonably priced Uber for us from the shop door.