The flat is really well located in Lisbon, near train station, metro, city center, supermarket by 5/10min walking. It is really clean and well decorated. There are bars and restaurants evewhere around the appartment, what is nice if you want to go out, less if you have family and kids.
Jorge is at your disposal and really open to answer your questions.
The appartment is on the 3rd floor with stiff and narrow stairs, that is why I think this flat is ideal for 2 or 4 adults, less with family and children.