We absolutely loved it. We loved the combination of old porto's building and modern interior design architecture.
As an architect, I love the colors and design of the apartment including the paintings. We have a great host that gaves us advice of what to see, what to visit, how to profit from our 4 days in Porto, we even get to see a surf contest!
The apartment is very well located. You have a metro station near but you won't even used it. You can walk to libreria lello, the clerigo towers, and if you follow the street downhill beside the apartment, you will arrive to the restaurants beside Douro River (where you can enjoy a good Porto, sangria and beer).
We where very pleased with our stay and if we ever return to Porto, we'll be happy to choose this place again.