Cristina’s apartment is a nice, spacious, modern place to stay for 2 people. You can see the river from the balcony and it’s basically 2 minutes walk from the historic riverside. You can also reach (climb, haha) the city centre in 10-15 minutes. There are a lot of bars and restaurants nearby.
Cristina is a really kind and helpful host, she is easy to communicate with. She even welcomed us with Porto wine and recommened great places. She also helped us to arrange a taxi, because we had to left really early in the morning for the airport.
Definitely would recommend for discovering Porto.