Luis was out of Porto while I was staying there but as we were both in Lisbon beforehand he suggested we meet for a drink the day before I went to Porto so he could describe the apartment any answer any questions I had. This was very considerate of him. He also prepared suggestions for the interests I had in Porto and arranged for a friend to be in the apartment when I arrived to hand show me around.
While I was there he emailed me to make sure that I was comfortable and that everything was fine with my stay. His communication was exceptional.
The apartment was in a brilliant location for exploring Porto on foot, was extremely spacious with generous living space and included a full-size bath. It's on the second floor without a lift which didn't bother me but it may be an issue for some. There was construction work going on downstairs but I expect this will be over quite soon.