If you are having trouble with weight transfer in your golf swing PivotPro will help you learn to do it properly. It prevents swaying, over the top moves, reverse weight shift, and spinning out. There are not many training aids that I recommend but this is one I do.
Any movement in the golf swing begins from the ground up, simply because you need a stable base to be able to move at all. PivotPro prevents lower body sway away from your target on the back swing by keeping the right hip inside a canted vertical line, (created by the extension rod of the PivotPro) mounted outside of the right foot. This encourages proper weight transfer on the down swing from the right foot to the left foot.