This place is a great spot when you want to visit Porto. It is in the middle of the historical city, ideal to view the sites but also to rest from a day spending outside and to relax. I was traveling with a friend but it's also a good place with maybe two couples or a family. You have a big living room and kitchen to yourself.
Only one small detail: The livingroom and one of the bedrooms are facing a busy street. During the end of the evening you do hear people on the street who go home after nightlife. To me it was not disturbing (it's not the whole night through so you can have a good sleep) but it's good to know.