It seems to work fine for them. And with the apparently simple invoices, why bother making things more complicated by using a more complicated tool? If the invo

It seems to work fine for them. And with the apparently simple invoices, why bother making things more complicated by using a more complicated tool? If the invoices were complex, I'd agree that this method might be the wrong tool, but for simple invoices, it seems like a lightweight and fairly straight forward approach. So it can be considered a right tool for the job.