Cristina's house is possibly the best airbnb I've been into. It's near the historic center by foot, and sheltered from noise. One could imagine oneself being in the coutryside while seating in the garden, which has a number of trees including fruit trees. The house itself is a delicate, well-furnished place with impressive wood floor and audacious art pieces decorating the walls. Cristina was very nice and provided advice on the city, food for the first breakfast and a little surprise typical from Porto. There are also a pair of dogs greeting you every morning in the garden, Mimo and Pipo. All in all a perfect place to stay.