Staying at Aida's Haven was nice because the apartment is situated really well if you want to discover the old town on foot. Alexandra gave us some ample explanations and great adresses to eat out, so thanks to her we discovered some really nice places that only locals know ;-)
However, our bedroom was pretty small and at night there was much noise in the street, so don't forget to take some earplugs :p Moreover, if you travel as a couple you must know that there is not much intimicy since the other rooms are just next to each other. All in all, it was a nice way to discover lovely Porto though!