This is a really nice perk IMO, and equals what I always loved about making WN reservations. So easy to cancel or change and no downside in making plans early. Really psyched about this option if mileage required falls. Only frustration is seeing a 40K route drop to 20K and then 5 minutes later it's back up to 40K... which has happened twice now watching this flight cross country the Sunday after Thanksgiving! Still, great to be able to monitor.