We really enjoyed our stay in the apartment. The view is unbelievable and you have everything close to you. The apartment has really everything you need.
We can really recommend to eat breakfast at nata Lisboa.
And it's best to rent a car in porto but don't park in the parking lot (20-30€) just park on the street nearby (20-8 for free ) and threw in 2€ so you can stay there till 10.