After your recent update you got rid of the ability to see if the customer has read the invoice email. We really need this back. When it comes to sending final notices and the customer denies that they ever received an email. On the old one we could see if they really have opened it. That's just a brief explanation of why we need that feature back. Also it would be nice if you added two step verification for quick pay. As in when you click on it a message comes up "Are you sure?" then yes or no.