I got one just because a lot of people I know have one (peer pressure is a motha), glad I did. After I had it awhile I decided to try shooting my bow without just to see if it really did make a difference. Long story short, I ended up shooting one of the worst groups of my life. Threw the S- Coil back on and I was back on target. It balances my bow a lot better which really improves my accuracy. It's probably all in my head but hey, what ever helps ya.