I just put the NAP Sizzor on my Guardian and it has been awesome. I was a little skeptical about it at first, but for me it has been great because I can be in the tree stand or on the ground and don't have to worry about my arrow jiggling around or falling off. You might check it out if you want something that has similar qualities as a full containment but is still a drop away.

Obviously I haven't used it for hunting deer here in Kansas yet but when I'm out in the woods it has been reliable.