The big advantage of cash envelopes is that, if you budget properly, you will always have the cash to pay a bill when it comes due. No more worrying about where the money will come from, be it for mortgage or rent, utilities, car payments, repairs, taxes, discretionary spending, etc.
Setting up a budgeting worksheet isn't a hard chore. In fact, if you like using spreadsheets it can actually become quite enjoyable. The beauty of a budgeting worksheet is that you can see all your numbers at a quick glance in an easy to read format. It's instantly editable so changes can be made on the run and will save considerably on white_out. And perhaps the best feature, is that you can always keep a history of your transactions (depending on your hard_drive space).