This is a very, very useful quality golf training aid by first finding out where you are impacting on the club face and where on the ball you are striking (which interprets how the ball would have spin). Comes with a DVD explaining various impact problems and drills to fix them. Every time I let a golf friend try it out, they go and buy one for themselves. Better and more feedback than impact tape, works for all clubs and can be used indoors.
Pros: Quality, Durability, Easy to Use, Good Value, Features