I stayed in Cristiano's house for three nights and had a comfortable, good time.
First, the house, the room and toilet for the guest and the views from it were just as described or shown in the photos. The space is very well organised, personally designed and equipped with everything a traveller would need. The views from this probably one of the highest streets in Porto were so beautiful and panoramic. Besides, it is conveniently located for walking to almost anywhere in the old town of Porto - the river, the city hall, the cathedral, the train station and bus stops, despite some up and down geography of the town.
Last but not least, Cristiano was a wonderfully generous, accommodating host, easy to communicate. Whenever I asked him about the equipments of the house or the town and had to arrange check-in and check-out, he was kind and tried to help. Furthermore, he knows Porto very well and takes good care of his space, including the green garden outside.
I would like to stay in his house when I visit Porto again.