TTP: Trust The Process

TTP is a revolutionary test prep option, for a very fair price. It has more than everything you need to beat the GMAT. You just have to trust the process–one thing to note about TTP is that it takes time. To really make progress there are no shortcuts: you need to read all the lessons, complete all the tests, and do all the review. Expect to budget over 150 hours for serious progress in quant alone.

My only constructive feedback is that they might like to incorporate some OG work into the mission structure. I found going through OG problems alongside TTP to be very useful, to see the variety of possible GMAT questions.

If you are looking to beat the GMAT, TTP should be your first and only stop.