The place is just perfect.
Close to the metroline to/from the historical center and the airport (it's not that easy to find free parking space in the neighbourhood/Porto.)
Terraces, bars, restaurants, small and larger shops (all kind) in the neighbourhood.
Within walking distance from the historical center.
Easy automatic check in with clear instructions. The hosts (Abel, Fatima and Rose) are always there to answer any of your questions and they do that in a fast, kind and efficient way.
4th floor with elevator. Beautiful and spotless clean. The place has been decorated with care (no second hand furniture, no kitsch and no old towels here!). Excellent bed. Very good bathroom. Pleasant living-dining room. Well equipped kitchen (a toaster would be nice... and that's really the only suggestion I can think of!).
If I go back to Porto, this definitely is the place where I would love to stay again!
100% recommended!