I started began with a GRE quant score of 155 and wound up getting a 163 when I took the test. I only used TargetTestPrep materials to study for the math portion of the test, so they were the sole cause behind my success! In particular, the massive amount of problems they have available to solve was key in improving my score. Furthermore, the combination of reading material plus problems created a potent combination that greatly improved my understanding of the quant material. I would certainly recommend this GRE prep course to anybody who feels as though they haven't learned any of this math since high school (which is true). Studying for the math portion of the GRE is no easy task, but my experience with TargetTestPrep made it much easier than it otherwise would be!