We spent 5 nights in Porto and had a wonderful stay at Fátimas apartment. The flat is very cozy and thoughtfully decorated, and equipped with everything you might need. Communication was perfect, Fátima gave us a lot of recommendations for restaurants and to-dos and was very flexible with check in/out times.
The apartment is on one of the nicest and most touristy streets in the heart of Porto, so it is in a perfect location for exploring the city, but also very noisy. Even though there weren't that many tourists in Porto during our stay, it was still quite loud at night. Also there were construction works going on at the opposite building, which started pretty early in the morning. So overall, it might not be the best choice for light sleepers.