Mario's city apartment has a perfect location right in the center of Porto! The place was very clean and we found everything we were looking for! We loved spending some time on the sunny balcony! Due to all the 5 rooms being booked the bathrooms were crowded in the morning, but as we were on holidays time didn't matter ;) Mario has an app for Porto which is great and showed us a really sweet portuguese restaurant. Definitely download it and follow his tour