I spent 2 nights at Isabel and Carlos' lovely place in Foz do Duoro and would highly recommend it. Isabel is a very gracious host; she let me check-in quite late and explained everything about the facilities upon my arrival. Being 2 minutes from a lovely, peaceful park adjoining the Duoro river, 5 minutes from the actual mouth of the river, and 10 minutes to the beach and the centre of the neighbourhood of Foz, the place could not be better located. You can get to the city centre easily by bus in 25-30 minutes. As for the room, it was spacious, independent from the other parts of the house (so you can enter directly) and has a workspace as well, so you could comfortably work during your stay.
It was my second time in Porto and as I'd quite liked Foz on my previous visit, I decided to stay in the neighbourhood this time around. Isabel and Carlos' comfortable and well located place meant that my stay went perfectly. Thank you and my best wishes.