The simplicity of it! This software is easy enough that anyone could use it even if they have no experience using this type of system or technology at all. It's not just very user friendly but also offers some excellent features such as its ability to keep records straight. I really like how easily everything comes together through one application which helps reduce errors when creating invoices or receipts. Sometimes there are minor technical glitches here and there (which usually don't last more than 5-10 min) however nothing major. If you need an invoice creation tool where customers pay directly online then look into brighterspsa because it will save them time from having to wait days/weeks for payment after sending out the invoice. They receive payments faster without needing someone else involved so we can get back quickly doing other tasks within our office! We've been able to.