This app is easy to use, streamlines the immigration process, and saves a ton of time! You literally skip the regular line and are out of there in minutes! I was traveling back from the Caribbean with my two daughters. While I was in flight, I added my two daughters’ and my passport information quickly by using the app’s scan feature for each traveler, which auto populates the passport info when you hold your passport in front of the camera of the phone. We each also took a selfie to accompany the passport information. As a final step, as soon as we landed, I filled out the required questionnaire by adding my arriving airport and terminal (in my case, ATL terminal E) and answering a few customs related questions. I then submitted the form, which generated a barcode receipt good for 4 hours. Only one form is required for all passengers traveling together, which is great! When we arrived at the immigration line, we went to the line that said mobile passport where the agent walked us straight to the front of the LONG line! No joke, our wait time was 5 minutes! Even my daughter commented, “Did we just skip the line?!” When we got to the window, the agent examined our passports, scanned our mobile passport barcode, and we were on our way! If your airport participates, save yourself time, and use this app! You will not regret it! It’s awesome! Just make sure not to submit the form until you land. If you want to get a head start, the app allows you to save the completed form and just hit submit when you are at the airport. I didn’t complete the form until we landed, so I submitted it right away, but it was so quick and easy, I was done by the time the plane taxied to the gate.