What's the best test prep company?

<p>I currently use Advantage Testing (I think they're based in NY), but do people have any suggestions?
For example, what do people think of companies such as Kaplan or Princeton Review?</p>

<p>I had a PR tutor and he was (is) phenomenal. My math score went up from a 55 psat jr. yr to a 780. However, I specifically got him on the recommendation of a friend so I don't know the company as a whole. If thy're anything like he is you'll do great.</p>

<p>Wow... That's great!
Can I ask which state you're in?
Also, does anyone else have any suggestions??</p>

<p>I used Princton Review's classes for my SAT prep, my score went from a 189 PSAT to a 2080 SAT (a 190 point improvement).</p>

<p>Capital Educators is supposed to be good in the DC/Baltimore area. Several of my friends have taken courses with them, and one of them raised her score by 200+ points.</p>