Everything about this apartment is great. It has a lot of space. It has all the facilities you need to relax (big bath, small balcony, HD tv), to cook (the kitchen has almost everything) and sleep (bed is fine). Its location is very convenient, near metro, bus and train. In about 15 minutes you can reach nice and quiet beaches by suburban train, for example Miramar. By foot it takes about half an hour to the old city center.
The communication with Nuno was all fine. He was not in Porto, but his father let us in and his sister was always available for questions.
The only negative point I can think of is that there is a lot of noise from the street if you want to sleep with the windows open. But with earplugs it was ok.

Overall we had a very nice stay. Great value for money!