I could be wrong, but if the business is using ERPs (to the extent of hiring implementation specialists), they're likely already too big for this type of software. In it's current form anyways, this feels like something small business uses to appear professional, big and/or well polished. The bigger company would use the ERP solution because it integrates with their general ledger, etc. and at that scale putting any focus on 'pretty invoices' is probably just a waste of time. It's really better to focus on getting them paid quickly.