The Kronos/UAL PBS is more intuitive. It uses a simple point system. You could say 1000 points avoid All Night Flying and 100 points desire LAX turn. There were no "groups" it just came down to using 1 to 1000 points to prioritize what you wanted. It was simple, but limited if you wanted to get a little tricky. In general, there was no way to build an "if then" or "if not then" logic. The Jeppesen PBS allows this type of logic, but I can see how easily the Jeppesen system can become overwhelming. I'm glad they are planning several test bids so we can all get some practice first. Hopefully, a large enough group will take part in the practice sessions to make it almost real.