Apartment is perfect: really nice, clean and modernly equipped. I can definitely say this is the best apartment I stayed in. Location of the apartment is also great: it is not far from the city center, while the neighbourhood is silent. In addition, at the day of arriving my friends and I came later than it was expected and agreed with the host. Despite that, host didn't have any problem and welcomed us after 11 PM.
I definitely recommend this apartment and if I ever come back to Porto, I will try to book it again.