I had an excellent stay at this place, and Constantino is a fantastic host.
First of all, this place looks 10x better in person than in the photos!
It's bright and spacious, with all the commodities (fresh, fragrant towels!).
The flat is very near to the center and allows you to visit the city on foot.
The bed was super comfortable, the whole place clean, and a great living room area to chill in after stomping around the streets of Porto all day.
You can easily reach it in ten minutes walking from the metro station.
Definitely recommend staying here.