Franceline was really nice and helpful. We arrived late in the night so we picked up the key at her place and that was not a problem for her. The flat itself is as well really nice and it's super cool that you have bikes for your stay included. So my boyfriend and I explored Porto by Bike. Nearby is a metro which you can use to drive to the centre and one line goes directly to the airport. All in all we can recommend it and we would come again ! :)