This is a very spacious apartment with easy access to one of the most beautiful cities I have seen in Europe. It is located deep in the historic Alfama district, which is apparently the oldest district in all of Lisbon! Some of the streets are barely wide enough for a car, so you will be doing a lot walking. This is no problem, as there are many restaurants and bars within easy walking distance. There are also tram/streetcar lines that run right down the road from the apartment.
If you want to Uber too, there is an easily accesible road 5 minutes away. I would recommend walking down to that road, which is next to Museu do Fado, as Uber drivers could possibly become lost in Alfama's winding streets. Uber is very cheap here.
The majority of places nearby that only accept cash, so be sure to have some Euros on you if you decide to visit. You will definately save money if you do.
Within a 15 minute walk is one of the best seafood restaurants in all of Lisbon, Cervejaria Ramiro. Unfortuantely the lines there can be very long and they do not take reservations. We had to settle for the second best seafood restaurant in Lisbon, Cervejaria Barcabela. It was the freshest seafood I have ever had, and the prices are not too bad, though a little higher than other local restaurants.
We were given a ride to the apartment from the airport by Elsa and Rui's friend Carlos, who gave us a little tour as we drove to the apartment. He was very helpful and provided great insight into Lisbon and Alfama.
I highly recommend Elsa and Rui's apartment to anyone thinking of visting Lisbon.