I use quickspins too, and they claim they spin up to 300 times faster. Don'tknow if that 100% true or not but I do know they spin faster than normal vanes. I also know they slow the arrow down and they are a bit more noisy compared to other vanes. But for me the positives outweigh the negatives. In Idaho we can't use a expanding BH and I also perfer a big heavy broad head for elk. The quick spins are awesome for big fixed blade Bheads so I use them.