Certainly a lot of it is a learning curve for me and I kept changing the times from morning to mid afternoon to night trying to find a red eye I knew existed. To me personally the biggest drawback is guest pass users not being able to manage and pay for their own flights. I have two families that use mine I give them the passes at the begging of the year and I do nothing going forward, they know the system and all the rules as well as I do. I also do like the 3 day window and the return flights without having to reload the itinerary and dates.