I teach for Manhattan Prep, so I’m more than a little biased, but having taught for plenty of other test prep and tutoring companies, some good, some not so much, I can tell you that Manhattan Prep is far and away the best GRE prep company in the business. Why? 1) Every instructor has a 99th percentile score and 2 or more years of teaching experience before they start at Manhattan Prep. Not only will your instructor have a perfect(or near-perfect) score, but all of his or her colleagues have perfect scores. They’re 2) The company invests over $ 5,000 training every teacher before they’re allowed to teach in the classroom. I earned maybe 500 bucks training for my first test prep gig at one of the big companies. 3) They pay their teachers enough so they actually care about their students. I can pay my rent teaching 3 hours a week for this company, so I make sure that my students are happy. Come check us out(again, I’m a teacher, so I’m biased)!