Great host!
The location of the house is perfect, close to the main tourist attractions in the old city center and to the Louis I Bridge, but also in a really quiet and tidy area.
The host is awesome, always replaying fast and being helpful. We were also welcomed with some tasty Port wine which we enjoyed.
The house is really clean and fully equipped.
I have rated other locations in Portugal 5 stars, but by comparison this would be a 6 stars easily.
Totally recommend this if you are visiting Porto.