The purchase was a complete waste of money. I had the e-mail on my telephone and the woman had no idea what she was looking at. After lots of fumbling about she told me to go and get another boarding pass. Because she did not know what she was doing I ended up taking longer to get through that the people who did not pay for priority security. I eventually changed the image on my phone to scan my boarding pass and ended up going through priority security anyway (without proving that I had paid). Unlikely I will purchase again as it seems to add time, instead of saving it. Stewart