As mentioned by other users, the sound insulation is very poor, so that every single word spoken in the apartment above can be understood. There is mould on the entire bathroom ceiling, the kitchen is tiny and dark and the dishes in the cupboard were not clean when we arrived. Also, everything is the kitchen is weirdly sticky.
On the other hand, the apartment is located in a beautiful neighborhood, and the other rooms are very nice, especially the bright living room windows. Lisbon is an amazing city, and the apartment is very central, so that you can reach everything by foot. Both Gisely and Patricia were very nice and helpful. Due to the mentioned problems, however, I unfortunately can't give more than 2/5.