The apartment is really nice and ideal for 2 people. It is quite close to city centre - 10 min walk or 2 metro stations ride.
It has everything you need for your stay in Porto.
The bars/café places, shops are very close to the apartment.
The only thing to bear in mind is that there is no real heating only air conditioning that easily warms the room.
We really enjoy our stay in Porto. And can highly recommend this place.