Flight was delayed and I was able to sign in to app and reschedule with a click of a button, resulting in us having a shorter layover and getting in 45m earlier! This was at no additional cost and was simple to do. So instead of being the many individuals waiting in line to talk to the individuals at the desk we were already sitting at our new gate. Also, being able to check where your bags are relieves a lot of stress for me as I’m always worried they won’t be there- especially when I’ve made flight changes. The app informed us when they were unloaded from our previous delayed plan and when they were loaded on to our new flight.