Pedro's place is an excellent choice for visitors to Porto. It's located south of the Douro River and its balcony provides some of the very best views of Porto you can have. It's a stone's throw from the Dom Luis I Bridge, and the Ribeira is a quick (10-15 min) walk away. The apartment is very spacious and clean, and has plenty of nice little touches such as a large kitchen and bathroom. It is a good place for 3-5 people visiting Porto for sightseeing, and is comfortable enough for a family trip.
Pedro's a wonderful host: he gave us a detailed rundown of the must-visit places in Porto, and also very helpfully provided us with a list of excellent restaurant recommendations. He was very helpful during our brief stay there. Highly recommended.