I have one of these, and when I scan books for Distributed Proofreaders, I use the included Book Pilot software, which automatically flips the image 180 degrees. I find I can do about 150-200 pages an hour with it.
While I'm quite happy with the scanner, I will note that after about 2 years, I had problems with my scanner. I had to send it back twice to the manufacturer to get it resolved, and I had to call them several times to find out what the status was.
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