Recently finished a glorious 10 night stay where, 60 days in advance, had excellent fastpass plus selections including Flight of Passage and Slinky Dog Dash in the morning for days 60+9, 60+8, etc.
Got sick on FOP but later blamed it on being drowsy from not having enough sleep the previous night. So went on it again a few days later using the second FOP FP I booked the 60+ days earlier, no ill effects this time.
Have a few more unused 7 day Magic Your Way tickets saved up so will be using them up gradually, of course taking advantage of 60+6, 60+5, etc. fastpass booking, or maybe 60+7 or 60+8 fastpass booking if I choose to stay longer.