Are the sparknote ACT tests any good???

<p>Are the sparknotes ACT practice tests any good???
I heard that the passages were alot longer than normal, is this true??
How accurate are the results??</p>

<p>My son took 2 of the sparknotes practice tests - got a 25 and 27 on the practices without anything else (classes, seminars, other books). Official score was a 29.</p>