I and my boyfriend spent 4 days in Porto and very much enjoyed our stay in the apartment. Carlos was an amazing host, and gave us some great local tips, as well as very useful maps.
The apartment had everything we needed for a comfortable stay. The host even greeted us with a bottle of wine from Porto. Cool neighbourhood, in close proximity to everything (around 15 min walk to downtown), around 20 min walk to other up and coming parts to explore, at the same time quiet to not disturb you with any noises from the street.