Mario‘s place is absolutely great for exploring the city! The neighborhood is amazing, so many lovely restaurants within a 5-10 minutes walk, also the river is within 10 minutes walking distance. We really enjoyed staying there, it has everything you could need. Mario is such a nice host, too, we were able to check in a bit early and communication with him was super quick and easy. He even hoisted our heavy luggage up 3 stories to our room - thanks again for that Mario :)
All in all a perfect apartment for exploring Porto!