We had that same 8:00 flight to MIA when we left on a Friday this last trip. 3 other international flights landed besides us and immigration was a zoo. With GE we just walked up to a Kiosk and zip we were done. Regular Kiosks had mass back ups. 5 people ahead of us in the GE line and off to baggage. No body in the PRE line to speak of and at our next gate way before needed. GE is well worth it even if you only have to use it once a year.