The apartment is located right in the center. It's really easy to walk everywhere from there! Joana and João were very responsive to our messages, it was very easy to communicate with them. The flat is cute and clean, they provide all the essentials, plus maps and other useful brochures. Since the flat is in a very touristy area it can be a bit noisy, but that's kind of expected and it didn't bother us since we were exhausted from walking around all day. Keep in mind that Lisbon has lots of hills so if you have big suitcases expect that you have to carry them up and down the streets a bit because you can't park right in from of the apartment. I definitely recommend the place, especially if location is important to you!