I used a fraction system when first starting to "play" pool.
After dipping my toes into the shallow end of the serious side of pool I began to use hal's SBOB. I reached the lower levels of shortstop skill level before leaving pool for many years ago.
Then, after returning to pool many years later I returned to SBOB. Then, after being back on the table for a year or so, I noticed I stalled at a weak "A" skill level, thinking to much time had passed and i would be there forever.
Well, only after studying Shuffets FREE online vids did my skill level move up another notch from a weak "a" to a mid level/solid "a" skill level.
I've never spoke to Stan. I've never watched even one of his d.v.d.s.
I for one KNOW FOR A FACT that "to me", cte pro 1 works and works well.
I have several friends that have bought his d.v.d.s. Some of them "get it", some "don't get it".
I already used something that, IMO was closely related to stans work. IMO, that is why I grasp his work so well even though, I have only watched the free vids and talked to a couple of successful users and gathered hints here and there.
Just like any particular cue, stans cte pro 1 will not make you better unless you adapt to it.
Rake