So nay…I dont see any before/after pics on their website, so they are not showing us any improvements at all.
Many of the demo swings have bat drag.
Most youth kids have bat drag, so if it's not fixing that, why bother?
Here is a free drill to greatly improve your swing. Stride to toe touch, and pull the back elbow like a bow. At toe touch, make sure the rear forearm is flat. the bat head is pointed up, and your front knee is very bent. Guaranteed or your money back.