760 using Target Test Prep Exclusively

TTP is 110% worth the money. The quant is without question the best option if you're serious about getting a very high score and are willing to put in the time and effort to do it right. The verbal, while not complete yet, looks VERY promising, and taught sentence correction in a way that progressed and felt logical 100% of the way through. I went from getting 8 sentence correction questions wrong on Official practice tests to 1 or 2. Their explanations were much better than the official material which I was using to supplement the TTP Verbal due to the lack of Chapter Tests at the time. The results speak for themselves, I got a 760 (Q48 V47) thanks to the incremental and exhaustive content from TTP.

Be warned, this is not a good option for people with extremely limited time to study or who just want to hammer out a "good enough" score. It is built to take 100+ hours of study to get you into the Q48+ range and doesn't really have a good option to rush if you are just looking to get over a minimum threshold of 650 or something. I spent 4+ hours a day studying with TTP to get my score, don't expect to get similar results in a month without dedicating serious time and effort.