What a lovely property! I stayed in the apartments which are about a block away from the main hotel in one of the studio units. Very spacious and perfect for 1 - 2 people. The bed was larger than I expected (as an American I assure smaller beds in Europe), spacious bathroom, a small but well provisioned kitchen and strong air conditioning. Though it was just me, I appreciated the sliding glass doors and thick curtain separating the sleeping space from the living space.
Only minor complaint is that the thermostat emits a bright light, but I was able to cover that with with the curtain by maneuvering my suitcase to hold things in place.
The staff is where this property really stands out. The front desk, doormen, cleaning crew and team at the restaurant were all friendly, helpful and went out of their way to make things easy for me.
Next time I come to Porto I will stay here again!