Author response

Review without even checking the system is the worse than calling other idiots.

You can email invoices/quotation from listing page.

You can add user for customer from list customers page and they can login to client area to view their quotation/invoice and even make payment for any invoice.

I don't think you have tested the live demo before purchase (bad habit) and I am pretty sure that you haven't use it long after install and didn't ask for support before reviewing the item. The both features mentioned above are already there.