Message in a Bottle is a great apartment in the centre of the old town in Porto. A few minutes walk from the Metro Sao Bento, close to many shops and restaurants and many of the sites you would wish to see. As other have mentioned, the street noise can go on, but we came prepared with ear plugs and slept fine. Key collection was not at the property but was only a few minutes walk away and the system worked well. Duarte uses Guest Ready services for check in and check out services which was fine. We would certainly recommend Message in a Bottle to others visiting Porto.