We had a great time in Porto and really enjoyed Mario's apartment. It's in a great location, close to plenty of nice bars and restaurants and within easy walking distance of most of the main attractions. Though we didn't meet Mario he was easy to contact and provides plenty of information to make our stay easy. We loved sitting on the balcony each evening with a drink and some olives before going out for dinner. The apartment has everything you need and we even managed to cook a few times in the pocket-sized kitchen. All in all we had a wonderful time in Porto!