We had a fantastic 3-night stay at Pedro's place.
First of all, Pedro is a great host: responsive, friendly, he provided us with amazing suggestions about the city.
The building is literally around the corner from the Cathedral. We walked anywhere in the city centre and only took taxis to get to and from the airport and the Belem area.
The apartment is exactly as pictured in the photos, and it was spotlessly clean. It's on the second floor, with an elevator.
I would be happy to stay at Pedro's place again and I highly recommend it to anyone.