Sara is an amazing host. We had an early arrival and she was so kind and flexible to let us check in significantly earlier so we could drop our bags and start enjoying Porto. Sara came to personally greet us, show the place and gave us a few valuable tips about restaurants, places to see in and outside Porto.
The place is very nice and bright with a big terrasse, well equipped with a washing machine which was important to us as we stayed for 9 days.
One downside of Porto that we discovered is the seagulls. They are everywhere, even though we didn't stay too close to the riverside (Sara's place is ~2km away) and start screaming early in the morning and would not stop the whole day. Luckily, you can close the windows and turn on the AC if seagulls are too annoying.
So this apartment is a great place to stay in Porto!