Have been using Yep! for a while, replacing Paperport for document management (when I moved over to the MAC-side from a PC), specifically *.pdf's that track workflow of customer PO's, vendor acknowledgements, and invoices. Could not be any easier than this. The flexibility in the viewer and integration make it considerably simpler than Paperport (which only works on Windows) and at a FRACTION of the cost. Any questions I've had were answered personally and promptly by the staff.