<p>Which one is the best for
- material
- practice tests?</p>
<p>sparknotes/princeton</p>
<p>I use Kaplan and it helped me a lot (800), but it doesn't go in depth at all. If you are just reviewing I would use princeton or sparks, but if you have to teach yourself a lot of new material (I only took mechanics this year), then I would look at Kaplan.</p>