Ricardo is a very nice host, we had some questions before and during our stay and we received each time the answer very quickly. He is also very flexible, our flight was 2 hours late and he waited for us in the evening (very helpfull when you have 3 little kids with you ! ).
Concerning the place, the appartment is very nice and well located. You can visit all the center of Lisbon directly walking from the appartment. The last good point is the balcony with a very nice view of Lisbon Roofs, always to have a breakfast with this view.
We will recommend this place for a family (we were 3 adults and 4 childs).