My husband and I spent 3 days at Nuno's place, and only met him briefly. His mom was very kind to show us everything around when we arrived. The place is not far from the city center, but going by foot does not seem a good idea - unless you really like to walk and have enough time. There are no metro stations close by, but a bus stop in front of the building. It was not very convenient for us because we did not know the time schedule of the bus, so we would just sit there and wait (in the weekends it takes long, also to get the bus back to the apartment).
The apartment (especially one of the toilets) was not very clean, and Nuno apologised in person for that. By reading the previous comments I believe it is not a recurrent problem. Bed linnen and towels were ok, though. Neither the bedroom or the toilets have lock on the doors - something I'm not completely comfortable with.