TTP - Most Comprehensive Prep I've Ever Done

Strengths:

1. Quantity and Quality of Questions
2. Helpful question walkthrough videos for complicated concepts (especially helpful for Data Sufficiency Qs)
3. Constant review tests to make sure prior knowledge doesn't slip through the cracks as you start new topics

Would make the product better:

I think a bit more refinement of the concepts based on frequency would have been nice, but this is biased because I wouldn't be saying that if the concepts I thought were "extraneous" actually appeared on the test.

Overall I couldn't be happier with the experience I had. I knew that with test prep I would need some sort of established course otherwise I would have no idea what to do. Committing to TTP like a full time job helped me achieve a score that I barely dreamed of when I began studying.

For some advice on how to prep optimally (if you use TTP or not), I would say the number one thing that I did which TTP facilitates is returning to every. single. question. that you ever get wrong. Whether it was a silly math mistake, misreading a verbal question, misinterpreting the axes of a chart, every single mistake, if reviewed enough, is something that you will be VERY wary of during the test. I was able to catch a few of my own mistakes during the test when I realized I was on default mode and not thinking as critically as I should. Without that skill developed through hours and hours of reviewing my prior incorrect responses, I don't think I would've had the mental clarity to do this on test day.