Logisys check printing is stable because it provides a step-by-step process for finding invoices, selecting them for payment, and printing checks. Users can log in to their account, navigate to the transactions section to find open invoices, select an invoice to pay, choose a check number, vendor, and bank account, and then print the completed check. While the process has several steps, Logisys aims to guide users effectively through each stage to allow them to handle any volume of checks in a normal manner.