Just an idea for users.... Mark the edge of the glass piece underneath with a piece of pin stripe on the top, so as you slide it across a book, you can make sure you keep the document between those two marked points.
Another recommendation... Especially for New Users... Use the Cord that's included, and connect it to a portable power pack (that people carry to charge their phones while on the go). That will save you from going through tons of Triple A batteries.
Sadly the errors although informative, convince me this produce isn't worth the cost or effort. There are several smartphone apps that are easier to use.
