Cristina is a warm host. She was courteous, accommodating and offered many good recommendations of restaurants where local go and not packed with tourists. Her son Alfonso is a bright and polite young man and the three of us had engaged in some lengthy conversations at night during the time of my stay. The apartment is very clean and in a quiet residential area. The walk to the Casa Musica metro station is about 10 minutes, I prefer metro than waiting for the bus, which is two blocks of her apartment building if you are going to downtown direction, and right outside if you are coming back from downtown.
Strolling the neighborhood is also a nice thing to do. You get to see a very different part of Porto that has many beautiful houses. It reminded me of the Garden District in New Orleans. I highly recommend staying with Cristina.