Hi TargetPhD,
We have a good track record with retakers and have very positive results overall -- specifically from the verbal side.
That said, please take a look at the sample videos on our
homepage (scroll all the way down) to see if our audio-visual approach suits your needs.
The value we provide is in our unique, easy-to-understand thought process approach. You will not need to memorize fancy grammar terminology. You will not need to read every single word in each passage. And you will not need to memorize lots of formulas.
What you WILL need to do is to watch and rewatch videos so that our approach is ingrained into your head so that when you sit in front of the test, you've got our voice in your head guiding you through the test.