The place is extraordinarily stylish. It's a large space with a desk and comfortable bed connected with a kitchen. The kitchen has everything what you need for your meals. Also we had vouchers for breakfast in a coffeeshop.
The only thing which was a small downside was temperature inside. We were in the winter and in Porto actually was horrible wheather, but we felt it in the apartment too. There was a heater, but it was a little bit too cold.
What was really nice, Mario left us some tips and a map with possible sightseeing routes. He is really attentive host and the contact with him is perfect.
To sum up, I think that the apartment is beautiful, comfortable and it is located so everwhere it is possible to go on foot. It's is really rocemmendable.