Isabell was a really great host. She made time to meet me early to save me from the rain and took some time to explain the surroundings and sights. In the appartment are 4 rooms, ours was a bit dark because the window only went towards the stairway and you shouldn't book it because you can hear the sound of the cafe downstairs.
Other than that it was a great stay and a good location where you can easily reach all things you want to see in Porto.