The house was like pictured: very clean and really nicely decorated. The location is a bit off the city center, but for my personal purposes it was perfect.
The entrance to the apartment is directly from the street, and the local street "soundscape" (the noise from occasional cars and playing children) can be heard quite clearly indoors. During the night-time, however, it was relatively peaceful.
All in all, a pleasant experience; I would definitely recommend this house for someone who wants to see what Porto is like outside the most crowded touristic areas.