Been shooting off the string with the mongoose and Truball speed nockset. Getting excellent results out to 30 yards.
Have a gatorjaw on a scott molded hand grip that I used last year. While I LOVE the concept, benefits of a loop, etc, the release head is too long, and I actually lose an 1" over the mongoose with it.
Heck, I'm even considering just using the Winn, no matter what you might say
If I went loop with the rhino or other similar release, I wouldn't gain nor lose any draw length over the mongoose. Only with a head like the JD. I've shot with and without a loop, and must not be good enough to see it's overwhelming benefits. I shoot just about identical either way. Might as well get the additional powerstroke.