We used 2 with moderate success in 2016, but did 1 on our Oct 17 and May 18 trip and it worked the best. For instance we RD EMH at Animal Kingdom and rode FOP, Safari, Everest and Dinosaur! before 9am. This allowed us to let other members of our party that didn't have FP for FOP or the Safari use ours. Our FP were timed for 9:30/10:30/11:30, and the 11:30 I was able to move up to 10:30, and by noon we had eaten lunch at Flame Tree and were heading back to the hotel for a break. We had FP set up for the evening for Everest again. it makes for a productive, albeit very exhausting day.