The apartment is ultra-modern, clean, comfortable, and well located in a very quiet neighborhood and building. One day we got to watch five peacocks from the nearby park visit the lovely garden the apartment overlooks.
Antonio is a very responsive and helpful host.
For us, being just a few minute walk from the Jardins do Palácio de Cristal was a huge plus. The large public garden/park is peaceful and beautiful, with wonderful views and a nice variety of birds.
The minimalism of the apartment might be a touch excessive, with no place to hang towels or clothes in the bathroom, and too few dishes to be able to make use of the dishwasher. But these are minor drawbacks, and we would highly recommend staying at the apartment, and would do so ourselves if we return to Porto.