You don't have to worry about the location that porto is very small and you can reach to anywhere from Maria's place by walk.
She was super kind and waited for me for an hour when i arrived late. There were tripadvisor no.1 restaurant just across the street and also i could find very decent restaurants near easily.
The apartment was exactly same as described in the picture. If you are sensitive you might have some trouble getting sleep as there is a very lively bar just in front of your house, but i enjoyed it also.
Recommend it!