Flipout:

Also, consider:

When you have to visually check a device to determine that your form and anchor is correct and consistent, the ability to unconsciously and consistently be in correct form and at correct anchor can never be a completely physical conditioned (mostly unconscious) action. Under hunting conditions, that is not a good thing.

I can go with using the "No-Peep as a temporary training device or a recheck device for shooting form when a shooter has not shot for an extended period, but dependency on the device beyond practice is not something I personally would promote for hunting purposes.

I am under the understanding that the "No-Peep" is not a sighting device, that the chief function of the device is to check form and anchor. If it is not a "sighting" aid, then how does it replace a "string-peep" or how does it function as an eye-to-pin-to-target aid?

Although I do not like or use a "string-peep," the "string-peep" does function as a rear sight and does keep your anchor consistent without having to put too much conscious effort into it other than aligning your pin in the aperture.

Keep in mind, when the moment arrives to make your shot, most of the time you will have but a few seconds to make the shot. Too much dependency upon too many devices….or a particular device, that requires conscious thought, visual alignment/adjustment, and physical adjustment, will cause a visual and mental distraction, will increase the lag time from sight to shot, and can result in a lost shot or a bad shot.