Premise: On-course method is different than on-range method.
Premise: Aesthetically correct swing will produce good result.
Premise: Specific technique is superior to proper practice.

What if my method is the same on the range and on the course? In fact, my method is the same. What if my method is not aesthetically correct according to some model or other? In fact, my method is not aesthetically correct according to any model except my own. What if I use any technique that will produce the desired result? In fact, I use any technique that will produce the desired result regardless of how the technique looks or feels. I simply practice it extensively.

The product does not appeal to me because I see no need to observe a difference since there is no difference. Furthermore, the aesthetics of my method will not help me determine how well I strike the ball. In my opinion, no technique is superior to proper practice. But for somebody who's method must adhere to the premises outlined above, this product will serve the intended purpose.