There are a lot of gimmicks in golf and a lot of things you can buy to improve your game. I bought these to try after reading the "science" behind the idea. I have to say after 5 rounds with these tees I'm shocked with how well they work. I'm a +2 handicap and usually drive the ball 265 to 275 in the air. Since I put these in play my drives are 10-20 yards longer on a regular basis. The extra yards have helped my scores to drop lower in the last week and a half. I don't know if the results will be the same for everyone but for me these tees are pretty amazing and will stay in my bag.