Cozy apartment, very clean.
Enough room for 3/4 people.
Functional kitchen with all necessary appliances.
The are extra blankets in the rooms (it gets a little colder at night) and there are heaters in both rooms as well.
Rui answers quickly and helps with all the questions you might have.
The apartment is around 10 mins away from the subway "Casa da Música" .
Anyways we really enjoyed our stay at Ruis' apartment, definitely give it a shot if you're planning on visiting Porto!