I actually just used it last week to book a VERY last second trip to WDW so that I could take my oldest DD to the 24 hour event. We started bidding on airfare on Wednesday and after a few tries, they ended up offering us a price that was okay enough to take. So after then booking a resort and booking ME, we were off on a 36 hour adventure the next day.
We did end up with an afternoon (leave SYR at 3:45 pm and land in MCO at 8:21 pm) flight to Orlando and then an early morning flight (leave MCO at 8:35 am and landi in SYR at 1:46 pm) back home both on Delta. Looking back, I would have probably added an extra day to our reservation to account for the late/early flight times taking away from our Disney time.