<p>I've heard of them but they're all probably urban legends..geniuses who didn't need a prep book in the first place, hahaha. But that particular Barron's book was bad for me simply because I stress out very, very, VERY easily.</p>
<p>You more likely will get 800 in the real test,
if you miss fewer than 3 questions in Kaplan's practice test
if you miss fewer than 3 questions in Princeton's practice test
if you miss fewer than 10 questions in Barron's practice test
if you miss fewer than 15 questions in Meylani's practice test
Both Barron's and Meylani's are very good books, you will be well over-qualified for 800 by studying those two books. The few minor errors in Meylani's book won't hurt anything.</p>