One of the biggest problems is SBS. A lot of other regionals use CrewTrac. When I worked as a dispatcher/scheduler for a 121 company we used Sabre products and they worked pretty well. Last thing I've heard (from a Chief Pilot) is that they are working on a new system that will integrate with SBS. I guess they are going to test it on the 70/90 crews first and if everything works well, it will be used for everything. Maybe ftrpilot knows more...?