We had a lovely stay here. The apartment is very stylish and in an amazing location so it's a great base for exploring Porto.
We had just a couple of small complaints: the apartment is hosted by a business and we rather missed the personal touch (noone was there the check us in, though we were given clear instructions to get the keys); The kitchen wasn't stocked with wine glasses so we had to purchase two from a next door souvenir shop; and we were expected to take the rubbish out to the bins located down the road before checking out - we thought this should have been covered by the cleaning fee.
Overall, we had a good stay, but a few extra touches would have made it great!