We loved Claudia's apartment. The location could not have been better. Its right in old city but on a very quiet street. The apartment was modern with all amenities you could hope for to make your stay comfortable (washer + dryer, AC in all rooms, etc). We loved Porto and a big part of that was due to the wonderful apartment. We highly recommend it and will book Claudia's apartment in a heartbeat if we were to visit Porto again.