Mario was extremely helpful, providing us information on local attractions and restaurants. He was also very flexible, providing a safe place for us to keep our luggage both on arrival and departure. The apartment is very clean and its location is really great, close to the main train station and places of historic interest. It's also very close to the best custard tarts we tasted in Porto (Nata cafe) and a wonderful and highly recommended independent port shop (Garrafeira do Camo). The apartment is small (as shown in the pictures), but was very clean and had everything we needed.