My experience of staying at Federico's is similar to what has been described by many other previous guests. The room and apartment are clean and tidy. I did not meet Frederico very often during my stay as he allows you to come and go as you please with minimal fuss. But he is available to assist you the best he can if you have any queries.
I would add that the area is very busy during the day and has a lot of public transport options to choose from (ie bus, tram and metro). However, as the apartment does not face the main road the noise is minimal in the room I stayed in. It is a good option for a short stay trip.