I can tell you that we have used this quiver since it's beginning, and the same system (from which Tim got inspired) for 30 years now and it works. It's not perfect, but no quiver system is. However, if you are not a fan of bowquivers (like myself) then this is one of the best options. Easiest on/off, and "yes", you can crawl with it on all 4's or even your belly...the bracket makes a great handle, and it's so easily taken off and put back on that it's no problem at all. Also, realistically, as a hunter, the number of times you will actually crawl with it is so insignificant to it's other advantages that it shouldn't be the main focus. As a quiver with arrows go, it's as good or better than most in a crawling situation, and I can cite and show results of a few of these successes if needed, but the other "pros" of this are many. From easy on/off, to carrying the weight on your hips, to "no" straps around your neck and shoulders, to ease of grabbing another arrow quickly, to adaptability in different scenarios......
We have used this system from Alaska to Texas, and east to west with nothing but the best results.
And Tim's workmanship is second to none.