My husband and I stayed at Ricardo's place for 3 weeks in April.
Ricardo and Estela were wonderful hosts, and made us feel very welcome. They were always available to answer questions, and very available on the app.
The apartment was just as pictured, very well put together and comfortable, with good light and very well maintained. The new bath and kitchen together with charm of the the period building was a winning combination. Internet and wi-fi worked very well.
For us , the location was great: centrally located but not in the super touristy areas. It felt like a real neighborhood with excellent coffee shops, small restaurants, and a convenient supermarket. Public transport was close at hand in a nearby square. (Do not stay here with a car, as with all of Lisbon , parking is nonexistent).
The front bedroom had some street noise, but since were were visiting in the spring, and the windows were not opened at night, this was not a real issue. Summer might be more of an issue - depends on what you are used to.
I strongly recommend this apartment.