It isn't often that a listing just as good in person as in the pictures, but Joana and Diogo's place does. The space has been interestingly and painstakingly remodeled, and couldn't be more charming.
Diogo was very communicative in advance of our stay, gave us a great introduction to all there is to do in town, and checked in on us several times during the stay.
Porto is a hilly city -- so while downtown isn't far as the crow flies, be prepared for a hilly walk (or a cheap and quick taxi ride) to reach the center of town. That said, the riverside and out-of-center location opens you up to a visit to some real local gems!
We'd absolutely return!