Got the first pda in June 2006. Never had an issue.
You can choose to have your jobs to do in either date or address order, and you can change it at PDA level. We have chosen to have 2 weeks of work on George which is fine for us, although you can chose to have a months work on your PDA. You can immediately see how much work you have done in a day and how much cash you have also collected.You can also see all your customer debts.
For me it great as the three of us have each others work on our pda's as well. So if they are updated every night, then I'm only that 1 working day behind. This means that if I see one of their customers in the street, I can collect payment from them. When updating it sorts their pda out and they know where I am as well.
The one downside is that if you get a new job and you do it then and there, that job's details can only be loaded onto the computer that runs George, but it will be there on your PDA for next time. The other is that you can't enter a prepayment on the pda for a job to be done as that can only be done on the computer that evening.