The little duplex apartment is really nice, clean and within 5 mins you are at the Porto bridge (especially if you like taking the stairs). We booked the apartment very spontaneously which (thankfully) was no problem for the owners and we were warmly welcomed with lots of info and recommendations of what to do and see in Porto.
The apartment is well suited for two couples who have no issues with intimacy (since the bathrooms have glass doors).
We enjoyed our stay and Porto very much! :)