<p>The only thing I can say is that different learning styles do better with different test prep companies; buy a book from each, work through some explanations and problems, and see which one “clicks” the best. </p>
<p>On a related note, the people who improve the most with test prep are the ones who (1) put in the most time (think going through every previously released LSAT problem), and (2) who learn the test. You cannot brute-force the test; you do best when you dig down into each problem, understand what it is asking, and understand what each answer choice means. The LSAT has its own language, in a way, and you do best when you learn the nuances of that language. I say this as an extraordinarily good test-taker (e.g. 1550/1600 the first and only time I took the SATs, no prep course or even book) - there are no shortcuts to learning the LSAT.</p>
<p>Finally, study as much of the LSAT as possible before spending money on a prep course. Some companies do their guarantees based on your diagnostic score, so the higher the diagnostic score, the more they are guaranteeing you. (My 180 student had gotten a 174 on his diagnostic, and that was how the company roped him in - they said, look, you’re guaranteed a 175 or above or your money back. But the same principle applies to anyone.)</p>