Actually, I'm NOT a FP collecter. We attempt to make every return window. But, even the best laid plans can go awry...especially at WDW. Broken rides, overbooked restaurants, closed attractions, get caught behind a parade (yes, it's happens), etc.... All things, beyond MY control. It was nice to know, my family could still ride TSM or Soarin' (whatever) even if we missed our window. Once upon a time, we booked two or more TS meals (OOP) per day.. That will no longer be an option, way too stressful to meet so many deadlines