Target Test Prep - Worth It

Target Test Prep has a great structured comprehensive self-guided study program. The lessons and interface are great and make the user experience pleasant. Expect to spend ~3 solid months on TTP if you're doing a comprehensive review. I was consistently scoring 720-750 in the practice test phase. TTP helped me break 700+ on the official exam.

Quant
TTP is the way to go here for sure. Early on I naively thought I could handle quant because it's all high school math, right? I soon realized GMAT quant is a different beast. Being good at math can help you pick things up quicker, but it won't be a breeze until you become familiar with GMAT questions. TTP dives into each topic and has lesson questions and chapter tests to reinforce the skills. I think most people will consistently score Q47+ after going through TTP.

Verbal
While TTP is still in beta and tests aren't fully built out yet, it's still very good. Like other programs, TTP concisely explains why each answer choice is wrong and why the correct answer is correct. TTP CR demonstrates and categorizes what typical correct and incorrect choices and trap answers look like. Learning how to identify and categorize answer choices helped me save time by teaching me how to quickly recognize and knock out incorrect/trap choices while at the same time perform logical reasoning to narrow down the final choices. I supplemented with OG verbal questions. Once TTP verbal is complete, I think TTP will hands down be the best comprehensive GMAT program.