Susana was absolutely lovely and couldn't have been more helpful. She was at the apartment when we arrived and showed us around, giving us lots of local information.
The apartment is perfectly situated, being very central and close to Rossio square. It was clean, tidy and everything we needed was provided and more. It's got a lovely lived-in character - this is NOT an apartment fitted out with the bare minimum of low-quality furnishings just to rent it out on AirBnB.
I would thoroughly recommend Susana and her apartment to anyone wanting a central, one-bed apartment in Lisbon.