i've never tryed one but the website makes it sound pritty weird...it kind of reminds me of a level on a sight, when theres a deer in front of me that level at the bottom of the site is the last thing i wanna be looking at... unless you want it for target shooting, when you have all the time in the world to find it...if yourhunting and you dont like your peep i think youd be better off going with just a plain kisser buttonon the string...butlisten to the people who tryied it first hand