Ines and Narciso were exactly what you want in hosts - friendly, communicative and helpful.
The apartment itself was airy, bright and clean. It was particularly nice being able to have breakfast out on the balcony in the morning. It is situated in a quiet area and offers the perfect place to come back to after hitting the streets of Porto. The Old Town is just a 10 minute walk away where there a lots of lovely bars and restaurants and there's a bakery around the corner called Petulia which does the best chocolate croissant I've ever eaten.
I would not hesitate to recommend the apartment or the hosts and would definitely stay again if I were in Porto (which I someday hope to be - such a beautiful city!).