My sentiments echo most of those below--i.e., over the years, I've tried almost every other PIM, and despite it's outdated interface and much room for feature improvement, this one still beats them all hands down. The appointment, task and contact management, all in any number of user-configurable categories and sets, with smooth synchs to my Palm, make this app almost indispensible. But every time Apple upgrades the OS, I hold my breath hoping that PO still works. I don't suppose anybody has tried running PO under Panther yet?