We stayed at Maria Rita’s place for a total of 6 nights. We were a family of 6 (2 adults & 4 kids). Maria Rita was a great host. She was very generous of her time and provided numerous tips while in Lisbon.
The apartment itself is extremely well located (Sao George castelo, supermarket, easy access to public transportation, etc)
There is no AC but this was not an issue as there was always wind filling the unit. However, keeping windows opened at night might be an issue if you are a light sleeper but our kids and us were fine.
Finally, if you have young kids or a baby, Maria Rita has everything you need to make your stay comfortable.