We stayed at Viriato's place at the beginning of June and it was a fantastic stay. It is a recently renovated building, overlooking a derelict garden space but it is the sunniest balcony we have seen in Porto and it was a delight to have breakfast outdoors every morning.
The amenities were new and thoughtful. The bed is one of the comfiest beds we have slept on! The room has direct access to the balcony which was so nice in the morning! The place was squeaky clean and we had no problems with check in or anything. The host welcomed us and even drew us a couple of interesting tips in the area in a map of the city, so all in all a very recommended stay!