We enjoyed our stay a lot, basicly. we just loooooved the view, the bedroom full of light, the area (very central and very quiet at the same time), the coffee-machine ;-) We didn't meet Nuno, but he gave us by mail a lot of good info, and Leonel, who gave us the keys, also helped us well and was very kind.
the only problem is the fact that there is quite a lot of humidity in the kitchen , specially when we were there it was raining quite often. that gave a bit a strange kind of smell and feeling. probably you won't suffer from that too much in summer, but now it was a bit inconvenient. in the night we had also some strange noises from the pigeons in the roof, but that had also some kind of charm ;-)
globally the place is worth staying to have a great Lisbon experience!