What to say.. So, the apartment is really nice, and there is the parquet!!!!
The city centre is easily reachable by 5/10 minutes walk as well as most of the monuments. The apartment is also easily reachable from the airport; you just need to get on the tram and get off at 'Lapa' station and then walk for 5 minutes (or even less).
The whole apartment was very clean, very well-equipped and all necessary tools for the bathroom and kitchen were provided. We particularly liked the double size bed because it was super-comfortable and the terrace which was easily accessible from the bedroom.
Upon arrival, Carlos welcomed us very warmly. He showed us the apartment and he gave us several tips about places where to have food during our trip. He also provided us with a thorough overview of the city in terms of monuments and attractions - Thank you so much!
Therefore, we highly recommend the apartment for your trip in Porto.