Highly recommend in a time crunch

My quant increased from 34 (practice test) to 47 after one month of TTP. Highly recommended if you have only a month to study like I did. It's self-directed, which I prefer, and customizable with very clear explanations and tutorials. I didn't pay for mentoring, but Jeff still gave me a call after I signed up for the one-day trial. That was really helpful in answering my ignorant GMAT questions at the outset.

The chapters are long, so I was sometimes overwhelmed given my time crunch, but they're very thorough. I'd recommend taking every chapter practice test and afterward studying only the chapters that you need to study. Plenty of questions to work through.

5 stars because Jeff was so helpful and the software allowed me to take targeted test after targeted test, which is how I best prepare. And it didn't cost $1,000 like some of the study classes. That's a plus.