I have had Mobile Passport for a few years but this return through Atl was first time I used it successfully. I waited to send form till entered airport and could connect with their WiFi. It would not go through on Deltas WiFi. Got return codes quickly and we were able to bypass a huge line at immigration. I have both my husband and I on my same app. It was great and I also have to say I loved Atl airport. It was so easy to navigate