The location of the flat is quite good, walking distance from restaurants and shops area. Alexandra was friendly with us, she welcomed us late in the evening and gave us a lot of "Porto tips". The flat looks like in the pictures, the common area looks really nice. One small inconvenient is that it was a bit cold, as we could turn on the heater only when we got home.
Overall, we had a good time at Alexandra's place, I totally recommend it.