Christina's apartment was perfect for our needs. We had an early flight but Christina arranged a taxi to meet us at the airport and allowed us to check in early (as there was no booking the previous day). Christina met us at the apartment, showed us around and provided us with some excellent recommendations for places to eat/drink.
Porto is amazing and this place is ideally located to explore the city. The area felt very safe and is within a two minute walk of bars, shops and restaurants.
The balcony in the apartment has fantastic views across the city and it was lovely to sit there (with a glass of the complimentary port that Christina provided) and relax.
We would not hesitate in returning to this apartment should we have the fortune of returning to Porto in the future.