Why do counter line items not show the price per unit on the recurring invoices? It would be better to allow you to edit the price, not showing the price makes it difficult to understand what goes into the estimated total.
Also, there should be an option to alert you when a counter line item changes to 0. I have had this several times when asset counts fall out of scope or something gets replaced and is not marked correctly. I should not be sending out invoices automatically to the customer that are suddenly wrong, because an asset was changed or replaced.