It was a pleasure to stay in Mario's apartment. The contact with the host was good, he was helpful and quickly responded to our needs. The apartment is located in the center, in the old and stylish building. It is easy to get by walking to the most interesting places in Porto. It's quite spacious and has a small balcony. It's also clean and comfortable. You need to climb "few" stairs to get there but it was fine for us. We can honestly recommend this place!