We had a great stay. The apartment is quite spacious (common areas are bigger than suggested by the photos) and lightened (great windows and a balcony with a view to the street). We received treats like a wine and coffee (there is an expresso coffee maker). The only (minor) inconvenient was that the dishwasher leaked water when functioning. Also the washing machine may need some regulation.
The apartment is located in the third floor, so be prepared to exercise - well, going up and down is part of the Lisbon experience, especially in the Chiado/Bairro Alto location. Finally, the apartment is very well located in a lovely area of the city - a few steps to the Largo do Carmo and a few minutes from the Tejo river. Lots of very good restaurants and cafes (with delicious pastéis de nata) around.