My Dad showed me what was required to cut a ball into a pocket when I was 13 yrs. old. Basically he was showing me the ghost ball but without ever using those words & he explained that I had to make the certain point on the cue ball make contact with the certain point on the object ball. From that introduction, I naturally gravitated to fractional overlaps of the two(2) balls form the position behind the cue ball. I found out many years later that that is what Jimmy Reid started teaching. The difference was that I never used or assigned any numbers such as 1/2, 1/4. 1/8, etc, For me there are an endless number such as 3/32, 5/16. etc. I just never assigned those overlaps any number designations. It gravitated to a sight & feel thing especially since I almost immediately started using outside & inside english to both throw the balls in as I went for certain cue ball positions.
I have recently gone to CJ's TOI method of play & I will say that it all but takes 'aiming' out of the picture. You simply align the center of the cue ball to the center or the edge of the object ball & 'create' more angle off of those two alignments when needed by offsetting the cue tip to the inside of the cut angle. To me, it simplifies the game & takes stress away as it is simply choose the correct one of two (2) chooses of alignment & then 'create' the angle needed from there with the 'touch' of inside tip placement.
Hence I would certainly recommend CJ's TOI method. That being said, I am intrigued by Stan Shuffet's CTE Pro1, but I am waiting for his new DVD as it seems to be more complicated than CJ's TOI. Then again, I am quite comfortable with my non specific fractional aiming system.
For now, If I had to choose one to recommend to you, it would be CJ's TOI method, that is if your stroke is precise. If your stroke is not precise, for some reason, then no aiming system will be of any great advantage. As Mr. Ingo said, just don't look for a magic bullet, but if your stroke is precise then I would say that CJ's TOI method is a certainly a Silver Bullet if not Gold.
Sorry for the rant & I hope it helped.
Regards,