I cannot recommend TTP enough. What really differentiates TTP is that they captures the "tricks of the trade" in bite size formats. After every test chapter, you can identify 5-10 takeaways for the test that come in very handy and save you time. I took the GMAT with wildly different quant scores of 42-48. After using Manhattan and Magoosh for Quant I can say TTP is miles ahead of them and I highly recommend! Thanks to their team for also always being a moment's away for help and support. They also make proprietary formula and concept sheets that are great for on the go studying. Highly highly recommend!!