We stayed at Mathias's home for one week. We absolutely loved it. The apartment is modern and clean. It has all the amenities needed for a comfortable stay. It has an incredible view of Porto and the river. It's on the top floor, four flights of stairs. However, the apartment and the amazing views are worth it. The neighborhood was very quiet at night, parking was free and always available. Communication with Mathias was easy via email or text. Mathias apartment is a must stay we highly recommend it.