We had a great stay at Daniela's appartment.
The appartment was perfectly clean and by the detailed decoration you can tell that she cares about offering her guests a pleasent stay.
The combined living/bed room is spacious and contains a double bed and a big couch next to a dinner table. The kitchen is a bit narrow but offers everything you need.
It's a 5 minutes walk to the very city centre so it's well located too.
Daniela recommended several spots to visit in Porto and was very reliable and responsive in texts.