Eric,
I haven't tried it (and probably won't at this time). It LOOKS to set a good string hook -- finger tips pointed back at you. AND it would appear that using more wrist to draw will help with getting into the back more. I, also, don't see that the "wrist out" would interfere in any way with the "device."
I can certainly see where those with finger or arthritis problems may benefit from this. Kind of a "whatever works" solution. I guess I'm saying that I'm pretty neutral on this idea but really don't see a "downside" at this point.
Arne