Those that have them seem to love them. I tried making the Poor Man's red snappers
http://www.quiltingboard.com/picture...s-t234134.html and while these worked pretty well I still go back to pinning. I guess I have become proficient at it, and it seems easier to line up my centers for the backing. I have only been bit by the pins on a handful of occasions. The snappers use a bit more fabric so you have to allow for that when preparing your backing. Apparently they are rather tight when you first use them and it takes quite a big of hand strength to get them into place properly but I have read they loosen up with use. They make for quick loading once you get past the learning curve.