We stayed at Cristina place during Christmas 2017 (24th Dec to 26th dec). Her apartment is wonderful, very clean. The pictures are completely authentic. The best part was the river view right from the window. Kitchen was fully equipped. The TV in the house has got NETFLIX subscription, so neither Porto nor her place will allow you to get bored.
She is an excellent host, replied swiftly to every query which we had and undoubtedly deserves the badge of super-host. I recommend everyone visting Porto to choose her place.