<p>After doing the practice tests from Kaplan, Princeton, and Collegeboard, I come with the following judgement:</p>
<pre><code>As you all know, collegeboard's is the most trustworthy and accurate.
</code></pre>
<p>Kaplan's is the worst i have ever seen, vague and too much deviations from the official one, those brain-less editors are just making some up for nothing !</p>
<p>Princeton's is pretty good, but again, you should do it only after you finishing all the available practice tests distributed by the Collgeboard</p>