I don't like to leave negative reviews, and it's important to say that there's a lot more good than bad, but still some issues can be addressed by the host.
The good: the location is in the heart of bairro alto, yet in week days the street is amazingly quite. Also, the hospitality and availability of Margarida was really helpful and much appreciated.
The bad: the pictures don't give an accurate description of the space. There is a picture of a small sitting area in a balcony. This area doesn't exist and the little balcony is not usable. For the sake of honesty, I would remove this photo. Also the apartment is smaller than might be assumed from the pictures.
The other thing is essentials for a stay, like toilet paper that we had to buy in grocery store after the very little that we were provided with was done. Finding a place to buy toilet paper is not something you want to have in mind during a vacation.
These things are totally fixable, and I hope that for future guests it will be different.
And once again, thanks a lot for the hospitality in Lisbon, we had a wonderful stay!