We had a great stay in Porto. There were only a few minor things beyond the hosts control that slightly tarnished our stay.
The cafe downstairs can be noisy at times. From the room we were in we could hear everyone coming and going from their rooms. I would consider myself a heavy sleeper so it was only a minor annoyance on he days we wanted to sleep past 8am.
The room was well situated for our needs. It was a lovely walk into town every evening (mostly downhill). The walk back being more uphill.