In overall we had a good experience. The flat is big and has a balcony which is good if you smoke. We had a late check out so that was nice. I've made a suggestion to put the table (or buy a new one) for the kitchen and to put a non-windowed door in the living room,so if 2 couples stay in the house, both can have the same privacy. We also had a problem with the living room blinds but the owner fixed it. The only issue that i'd like to point is that we talked with 3 different people (before reaching the actual owner) and have our problem fixed.
I'd recommend this if you're looking to stay at Matosinhos for a few nights.