I needed a document holder badly. This was fine until used with Textbooks and with space needs. My rented textbook was ruined because of the sharp design of the holders-which fall out continually. The size seemed right at the time because of the ability to size accordingly but the smallest size (which is what I need usually) is not small enough and is not easy to secure. The rest of it is great for single page holders that will be removed instead of turned like a page.
This book holder is terrific. I use it for those big clumsy textbooks. Now I don't have to constantly lean over the desk to read anymore. Plus an added bonus is this device is Made in the U.S.A.
the page holders could be stronger with a larger book the pages want to fold back into the book and sometimes the holders will not prevent the book from closing