We had a great stay in Lisbon. The location is great. I don’t understand the comments from other guests that there are no restaurants close by or that it is difficult to walk due to the hills. Then don’t go to Lisbon. The historical part of it is built on the hills! There are several restaurants in less than 5 minutes walking distance. And instead of the metro, one can take the bus or tram which are less than 10 minutes away. And of course there is Uber. In fact, for us 3 it was cheaper to use Uber than to pay 3 public transport tickets.
The street where the apartment is situated is really calm, no traffic, no hordes of tourists running through. The only downside is that the apartment is poorly soundproofed. One can hear the neighbours walking, talking, coughing. For those who sleep deep shouldn’t be a problem.