It has saved me twice on long overnight cooks at low temp, had flameouts. First time I woke up before low temp alarm hit, but it woulda woke me up about 10 minutes later. Friday night it actually woke me up with the same issue on my brisket.
Yesterday I had the app up on my tablet while I was waiting for the brisket to reach 202. Was actually able to make a pound cake and get it in the oven with an occasional glance at the iPad.