Nuno's place is as good as it seems from Airbnb, if not better. Excellent layout (except the quite tight shower space) and quality, comfortable furniture, soft bed, well adjusted lights (we had some trouble finding the right switches though, which are plenty and not all are functioning). Also, it is in the very heart of the city, difficult to imagine better location for reaching anything a visitor wants. Highlights, restaurants - including fancy, tourist oriented and simple where locals eat - are in short walking distance. Grocery, market, shops, transportation are all around. Not to mention the riverside what is amazing!
The internet was down for several hours right away -which was very important for us- and it was not that easy to communicate when we realised the situation (it happened 2 times apart from the initial one). We called Nuno's mother, who tried to help us as Nuno was busy that day. It was difficult for us that we didn't know for hours what would happen as none called back or texted us after we asked for help/information. After all, it turned out to be a self healing problem.
We actually never met Nuno but his mother who welcomed us was kind and helpful too during moving in.
We disagree with previous opinions of being a quiet place. The traffic noise is not a problem, it is both expected in such a high profile location (tram 28 runs under the windows) and is moderate. The street 'musicians' are heard too much even through the closed windows and are disruptive: drums and other brass like instruments, possibly amplified are quite loud between 18:00 and 22:00 (broad period, actual times are shorter in a particular day) from the main pedestrian street just a corner away. We don't know if it was a special period of time (December, before Christmas) or it is always like this.
The facilities are fine, including kitchen equipment, prepare yourself for any basic goods such as oil, pepper, detergent or such if you plan to use those equipments (except if previous occupants leave something behind). When we had everything we needed to cook we prepared fine meal for ourselves without problem, actually enjoyed it.
All in all the place worth the stay. :)