We‘ve enjoyed our 4-day trip to Porto and our stay in Manor House very much.
The flat is located perfectly and the building and the view are really amazing.
There are 2 points you have to consider before you are booking this flat:
1) we had some rainy days and there has been an uncomfortable smell in the apartment. Alexander explained in Inder comments that it is because of the weather conditions. It was no big Deal but for some people it could be a problem
2) Maybe we had bad luck but we could hear every step the person in the Apartment above did.
If you can live with both the apartment is a perfect choice for your trip to Porto