As a photoflipper, I just wanted to make a couple notes:
1) On some books, you won't be able to see the part of the text near the spine of the book too well. Adjust photoreading stage accordingly.
2) Yes, it's fast, but go at a comfortable speed - probably around 5 seconds through a 300 page book.
3) Since it goes by so quick, I usually make several flips: once or twice normally, a couple times with the book upside down, and a couple times from the back to the front.
4) If you haven't been able to successfully activate books consistently, don't do it yet.
5) Or, do what I did when I started out (and still sometimes do) is do a plain 'ol photoreading session, then photoflip it several times just for good measure. I love this, because sometimes if you pull a couple pages at the same time when you photoread, you get a little nervous and say to yourself, "I just missed all that info". If you tell yourself ahead of time you're going to photoflip the book several times afterwards anyway, you relax whenever this happens, because you'll most likely get it the next time around.
-Ramon http://razor.ramon.com
