Apartment is located very centrally in Matosinhos Sul, close to beach, metro and restaurants. It is a very nice apartment with two good bedrooms, a nice living room, kitchen, bathroom (only shower no bathtub), balcony and with a small storage room with washing machine (though there is no dryer in washing machine so clothes have to air-dry which might be a bit more challenge during winter time than during summertime). Even though apartment is on 1st floor and right next to street, then no real negative impact with sound level from street even during weekend nights. It is ok to park either in front of apartment or in one of the sidestreets, though be aware that there is only free parking on street from 8pm to 9am on weekdays.
Our communication with Celco was in Engligh only and he was very responsive. Celso informed us before arrival that he wasn't able to be at apartment for handover of keys, but a family member showed up instead and was on-time even though we requested an early check-in. We requested a baby crib just 1 day before arrival, and Celso without hesitation came and provided baby crib for us for no additional costs.
All in all a very good apartment, location and owner, and I will recommend this to all who would like to stay in Matosinhos.