TTP allowed me to hit my target score

Prior to starting TTP, I had 3 attempts under my belt (680->650->600). I had been using other prep programs and just studying on my own, so I decided to give TTP a shot

Fast forward about 3 months and I had my target score. (730)

While this course does take a good amount of time, TTP gave me the best shot to achieve a solid Quant and Verbal score. I finished in about 2 months, and used the 3rd month to test prep.
The TTP team was very attentive to inquiries. As has been noted here, the Quant program is second to none, in my opinion certainly a must for any prospective GMAT test taker. Additionally, even though the Verbal is still in beta, it is an incredible program and very helpful especially in regards to SC and CR.