I had a bad experience on my flight from Seattle to Miami sitting in the back row where it was extremely cold. I was originally seated in this same row for my return flight and asked if I could move to a row closer to the front. The man at the gate did not even hesitate to accommodate me which I appreciated. We also had to sit on the runway for an hour before having to change planes and the staff was very good about keeping us informed and being apologetic about the delay. Definitely redeemed my experience from the previous flight!