Everything was perfect with our stay at Diogo's apartment. He and his parents are the friendliest hosts we've interacted with, the apartment is excellently located and carefully decorated and cleaned. We were welcomed with some pasteis de nata and port wine. The family made sure we were fine throughout the whole stay. We're also pleased that they do things the right way: the apartment is officially registered with the Portuguese authorities and the hosts follow their regulations strictly. Overall, a really good choice for out stay in Porto. Absolutely recommend!