Amélia is a superb host!
She was very communicative with extremely timely responses; even sending detailed instructions a week ahead to get to the flat from the airport (including train ticket costs, ticket details, etc). Her son provide numerous helpful tips on favourites around the city and was waiting outside for us upon our arrival.
The flat is a little gem in a very convenient location to walk about the city and down to the river. It was clean and exactly as described. Whilst my friend and I really loved staying at Amélia's because of the proximity to everything - it is near some popular bars and therefore, there is some noise in the evenings.
Combine all of this with Amélia's excellent and timely communication - it really allowed us to make the most of our time in Porto!