Well, like my current
SDA it syncs with Outlook, which is pretty good. Means I can do all my timetabling for uni on the PC then scoot it over - or make amendments while out and let it sync up with the PC.
I had a Palm (well, Sony Clié) but that has been sitting in a drawer ever since I realised the SDA does everything I ever used it for.
EDIT: also the Varios memory is non-volatile, meaning if it completely runs out of battery it still keeps everything