I've been a believer of the silver stuff for awhile,so when I saw the primos stuff I gopt some. On this last trip I had a 2 point feed into me to about 10 feet. The deer stopped and fed for over an hour within 20 feet of me, and never once smelled me, and I didnt always have the wind right either. he would circle and come back. It was cool, I definitely think it works, but I do still watch the wind for sure.