The verbal section of the GMAT surprises many people. It can often seem obvious that mastering GMAT quant will take work, but since GMAT verbal is language based, it's easy to get the impression that GMAT verbal will sort of just come naturally, while the truth is that GMAT verbal is pretty sophisticated and that mastering it can take as much work or more work than mastering GMAT quant.
Another thing about GMAT verbal that's good to understand is that what it takes to master it is somewhat different from what it takes to master GMAT quant. Whereas you can make pretty big leaps in quant just by learning some new concepts and strategies and then practicing applying them by answering practice questions, making progress in verbal takes both learning concepts and strategies and learning to see what's going on in verbal questions by doing careful, thorough, untimed, choice-by-choice analysis of verbal practice questions.
To get some more tips on how to ensure that your verbal preparation is effective, you could read this post on
How to Score High on GMAT Verbal.
Regarding, the
TTP Verbal Course, I'm sure that, by using it as described in the above mentioned post, you can totally master GMAT verbal, but you don't have to take my word for it. Since, you're already using
TTP, you could check out the
TTP Verbal Course yourself.