[740] TTP is the way to go. Marty is an excellent coach.

My very first GMAT practice test without any preparation was around a 580. I hadn't done any quant or verbal for 6 years! I then proceeded to study by myself using only the official MBA practice questions and after two months I eventually received a 690 on a practice, but I couldn't break 700. I knew I could do better, but I didn't have any direction. I was just doing mindless practice problems. My studies trailed off and ended after that. A couple months later I decided to try again, but with some help. After reading several reviews, looking through forums, and trying some free trials, I chose Target Test Prep (with the Verbal Beta). TTP is an excellent program to follow, and it's probably the best Quant program available. It will teach you everything you need to know from the ground up. You can easily gauge your understanding with the several chapter quizzes. I recommend getting 90%+ on all Medium difficulty quizzes before proceeding to the Hard quizzes or even the next chapter (If you want a 700+ score). Throughout the way, you can chat with their coaches. Marty, who scored an 800, is a master of the GMAT and an awesome coach. His understanding and in-depth responses helped me far more than any forums. Ultimately, I took the official test three times: 710, which I ended up canceling because I knew I could do better (I was getting 760's on Official GMAT practices), 730, and 740. I know I can do even better (I only did half the Verbal beta lessons, and on my 740 attempt, my Quant score dipped to a 47 because I was so focused on Verbal that I didn't review my Quant on TTP!!). However, I believe I have a high enough score to apply to the mba programs that I want. Overall, I absolutely recommend TTP and Marty. For Verbal I followed a mix of TTP Verbal Beta, which was incomplete at the time, and gmatclub's own GMAT Ninja. For Quant I solely used TTP.