Graphic artists or consultants
Uses simple and clear English
They don't have to be an accountant as well.
Familiar user interface, NOT another system to have to learn and remember we are all busy enough.
Save loads of time, typically invoicing reduced to 1/4 of time.
Client redesign automatically taken care of with recurring invoices, no reminders in Outlook to get lost.
Optionally allow client to view project progress for tranparency.
Your data backed up each night so no worries that your data is going to get lost.
Free accountant user, who can export your data. Why not reduce those accountant fees?