If you want to stay in Porto, Filipe's place is a great choice, the location is a close walk to everything. the Train Station, the tram, the bridge, tons of restaurants and shops, Be advised that if you bring a car make sure you print out the map Filipe provides in the description or you will get lost !
The apartment is clean and modern with one of the coolest showers I have ever used, and the small balcony has great views over the bridge and river. also out of all the Airbnb's I have stayed, I have never had one with a better stocked kitchen. and if you need food check out Forte dos Queijos a small shop close by that is run by the nicest older couple that has the best meats and cheeses.
all in all a great place to stay, Highly recommended !