Is this for me?
Do you struggle with hitting it fat, coming over the top, casting, and have never been able to truly compress the ball?
There are so many training aids out there and unfortunately we can't buy them all. Sigh. It's important to pick and choose the few that are going to progress your game the most effectively.
It's pretty simple, if you are right hand dominant, playing golf as an adult, you are likely doing too much with your right side. The benefit of learning the swing as a kid is that you learn to swing the club with your big muscles (i.e legs, core) because you haven't developed the muscles to manipulate the club otherwise. When you learn as an adult, your small muscles have developed in your hands, forearms, biceps, etc. resulting in the club feeling light and easily moved by your arms. The vast majority of adults have learned to swing by manipulating the club with their arms and hands. Both in the backswing and the downswing.
I have a simple test for you to determine if this product is for you. Take your right hand off the club and try to hit a ball with your left hand only. If you can't hit the ball or you have a lot of trouble doing so then it's a good indicator that your left hand isn't doing much in your normal swing. This product will be a complete game changer for you.