<p>So I did the first practice test today and found some glaring errors (apparently, 15 + 6p - 6 = 6p - 9...), which is making me really doubt the validity of the book. Are these errors relatively few, if you have used it, so I can trust it? I've heard around here that these tests are still relatively good for practice.</p>
<p>The book is not perfect. Even collegeboard’s blue one has a mistake or two. Generally, it is a reliable source to gain SAT practice.</p>
<p>The College Board tests are better indicators of one’s ability to score well on the SAT. Princeton Review’s tests are not as like the actual test, but they are decent; many high-scorers on CC have used them.</p>
<p>But both books have some errors.</p>
<p>PR practice tests have a ridiculous amount of errors! I hate them, and have stopped using them.
I only use the BB now and have much higher scores due to the lack of errors.</p>