We had a great time staying in Nuno's apartment.
The place is a lovely flat, right in the middle of the city, but not on the main turist trails so you can enjoy the beautiful surroundings of Lisbon's old town, without all night noise.
Nuno was very helpfull, with tips on what to do, and what to visit during our stay.
We would recommend the place 100% to anyone that wants to visit Lisbon.
Michael