We stayed at Elisa's and Louis' apartment for a long weekend. It was exactly like described, spacious and clean. We were welcomed by our hosts with almond biscuits - and now we are addicted. The ones Louis gave us for our home travel didn't even survive a 3hour flight.
Note that the area of the apartment is very central, especially during the night in the weekend it turns into a party. Elisa and Louis gave us earplugs which were really really good: we even hardly heard each other :D
The good side was, that everything was very easy to reach.
Thanx Elisa & Louis for your hospitality, we will keep good memories of Porto!