I'd highly recommend staying here if you're coming to Porto! The apartment is right along the water and has incredible views, especially from the balcony and from the terrace in back (built on a 12th-century wall, no less). It's very convenient to walk to the main waterfront area and to Ponte Luis.
Moreover, the apartment is bigger and nicer than we expected. 1 bedroom with a queen bed, another with two twins (Or maybe one was a full bed? It wasn't the one I slept in.), a kitchen, living room, and bathroom.
Only downside was that Miguel was late for our check-in, but perhaps we could have communicated it better on our end too. He was still quite helpful with bags and gave us helpful directions and local tips on where to eat.
Overall, I'd definitely recommend staying here while in Porto!