The ability of linking multiple accounts in one invoice/invoicing template makes it easy to track payments across several clients or projects at once - no need to keep separate records! Also very handy when invoices are paid via credit card instead of direct debit (which can be difficult with some banks). I dislike that you cannot send out an email reminder before your scheduled due date has passed if there have been any late fees charged against the account over this time period. If they could add reminders like Stripe then we would not miss them so much as currently do. Great tool which helps us manage our business finances more efficiently than manual filing systems previously did.