Great location, great snacks and bread fresh every morning! We were there when Eugenia and Luis were away, but interacted with them a bit on our way out-- they seemed really helpful and friendly! There is a fridge and dishwasher in your apartment, so that makes cooking your food really easy. Mostly everything you want to see is within a 10- 20 minute walk.
Tips: Definitely bring your own shampoo, etc because there is just combo soap in the bathroom, and in Portugal they don't seem to do 'mini/ travel' size. Also I would text/ message from the airport, while you still have wifi, to make sure someone is there to answer the door bell. Also bring comfy shoes because Porto is hilly!!