I tried them about 4 years ago and I sold a couple dozen to 2 other customers.
I didn't like them. They shot very well butI could really tell they were light becasuse I was always tightening my stabalizer and sight. The vibration and noise of the bow was very apparent. and it added alot of hand shock. At the time I was shooting a Mathews Ultra 2.
The other two customers have ordered more because they are into speed so much. It never caused a problem w/ their bows limbs but you can hear them shoot from a pretty good distance.