Loved TTP!

I started studying for my GMAT during the summer and was mainly focusing on doing practice problems, after reading the Kaplan and OG. However I began to hit a wall and wasn't seeing a large improvement in my practice test scores. I decided to pivot my strategy and found Target Test Prep to help me learn how to better tackle the problems.
The quant section was extremely thorough and a great refresher for topics I had forgotten about. They taught me so many important and useful methods for tackling quantiative problems quickly and correctly.
The verbal section section was also great, especially for sentence correction. I'm a native English speaker, but there were tons of important grammar rules and methods they taught (which helped to boost my verbal score).
I ended up scoring a 750 (Q48, V44) on my GMAT and definetely would not have done as well without Target Test Prep.