This apartment is in a great location. It is close to both the metro and Rossio station, where you can take a direct train to Sintra, and 2 grocery stores. We mainly walked and spent our evenings in Barrio Alto or right below at the brewpub, restaurants, or square. The market right next door makes it easy to run down for any last minute items you need. As other reviewers have noted, it is loud in the living room if you are trying to sleep there. However, the bedroom is quiet and dark so we had no issues with getting a good nights rest.
Lisbon is very hilly and carrying your luggage to your destination can be tricky. We watched many people struggle up and down the stairs throughout the city but you will have an easy time with this location since it is only a few steps from a main road if you choose a cab or Uber.
We did have to contact the host with an issue, but it was resolved quickly. If you want a great place in a great location, I would recommend you book here!