We had an amazing time in Porto, notably thanks to Jorge's suggestions. The apartment is very well located (5 to 20 minutes by walk to all main activities, places and points of interests) and well equipped. It just has a smell of humidity but Jorge has installed a dehumidifier and i'm sure he'll do his best to fix this.
I do recommend this apartment if you plan on visiting Porto ! Feel free to ask him for suggestions, he will happily help you ;-)