Mario's place is exactly as pictured. Located in a central location in downtown Porto. Mario's app provided great recommendations and insights on local attractions, restaurants, etc. which was a nice bonus!
My only critique is that we had received the wrong keys for our room and couldn't lock up. My boyfriend and I were only staying one night so we didn't get the security we wanted for our luggage. However, Mario was quick to respond to the issue and luckily our items remained safe.
The building has an elevator which is a plus especially in Portugal. All in all the room served its purpose and we had a lovely couple days in Porto!