Neat concept - you need to work on the design of both the creation process and the invoice itself. One second I'm working in a dark purple/blue space and the next I'm taken over to white space city for the final invoice.<p>Perhaps use a simple CSS framework like Foundation, Skeleton or Bootstrap to tidy things up design-wise. That's what will make people want to use this :)<p>Also, are we supposed to receive emails for each invoice? Didn't see one come through.