I have purchased nothing so far, still gathering opinions.
Per friends, it is one I am seriously considering.
Some claim it does a great job of maintaining arrow position and is super quiet.
Only down side I've heard is it requires some clearance not offered on some bows.
I learned this the hard way last year. If you're hunting in an area with lots of bear activity, it's a great idea to stash your food and water up in a tree. I like to wrap everything in a tarp and tie it between two trees. Don't just tie it up in one tree but tie it in between two trees at least 15 feet in the air. I thought I had my backpacking camp's food supply stashed pretty well last year. I returned to camp during the first weekend of archery to find all my food destroyed. Make sure...