I've known about CTE for several years.............since Stan first started studying it with Hal. The following link is a Thread back in early March that talked about this and my first Pro One lesson with Stan:
http://forums.azbilliards.com/showthread.php?t=309735
So I guess it's been about 6 months that I've been using Pro One. My previous high run prior to that was 115. Since then I've had over 20 100+ ball runs.........2 in the 140's, one in 150's and now the 219. It has definitely improved my shot making and overall game. There is an initial "learning curve" for sure.........weeks to months. But once you get it down the system puts you in a consistent, simple PSR for nearly every shot. After a made shot I automatically walk over the the CTEL of the next shot and without thinking see an aim line to A/B/C/ or 1/8.
Before that I guess I used the ghost ball/feel method.
DTL