I really loved how TTP prepared me for the quant section of the GMAT. I hadn't studied most of the math-related coursework for 6-7 years, and I was concerned that I had forgotten many of the basic concepts that I needed to get through the GMAT quant section. TTP helped me go from a quant score of 46 to 50 by helping me relearn those basics in a comprehensive, easy-to-digest format.
TTP's teaching methods were more comprehensive than some of the other at-home courses I had tried. I really valued the opportunity to do all the learning on my own, while also having TTP staff on hand to help via chat/phone whenever I needed. Overall, it's a great service that I couldn't recommend more highly for someone trying to brush up on old quant skills before the GMAT!