We had a lovely stay at Alvaro's apartment. It was on three levels in a quiet street a short walk from the main attractions of Porto with a view of the Dom Luis bridge. It was stylish and comfortable (beds were great and there were two bathrooms and a ground floor toilet). The TVs had English channels and a Wii which the kids enjoyed.
Alvaro had left food for breakfast and snacks, wine and even a traditional Christmas cake for us as we stayed over Christmas. Instructions in the house manual were very helpful as were Alvaro's suggestions. Communication was very quick.
We would absolutely recommend this apartment.