The full 5 stars - really a 6 star place. The Portuguese are the best and they do the best BnBs, the way it's supposed to be, with a warm personal welcome and more. Carlos is a great guy, easy to contact, but nothing goes wrong because this apartment is wonderful. The quality of the furnishings is excellent, the bed and pillows wonderful, the shower, the appliances - are all top drawer. It's only a studio but there is lots of space to hang clothes, to set up a work station, to make meal, it doesn't feel cramped at all, and the balcony gives you room to stretch out. You receive a full ration of bathroom essentials when you arrive, plenty of lovely towels, some teabags and all the rest.
The location is brilliant - you get no noise from the street or nightlife at all, but you are only a few minutes walk away from everything. It's so easy to get around and so easy to get home at night - there are three roads down into town from here, each with a different flavour. (I would recommend the Froiz supermarket 700m away near Trindade, much less crowded than Pingo Doce). Also being a short walk to Lapa you can easily hop the metro to the beach at Matosinhos Sul.
The West facing balcony gets all the sun, and you can sunbathe in private in the evenings. The double glazing cuts out all outside noise (or you can leave it open and wake with the cockerel that crows at dawn.) The only thing I would advise is that in the middle of summer it does get very hot in the late afternoon/evening, so I slept under just one sheet for the entire month - but I see that as normal, it is Portugal in summer, be thankful!