I have one on a 223 Wylde AR and I like it. I have several high end scopes and the glass is not those, by any means, but is still decent enough. The parallax knob on mine is really stiff, but then loosens, and then gets stiff again but it works. The crosshair is very fine, but measures accurately at full magnification. I have not conducted anything scientific, or close to it, in regards to tracking but the scope holds zero, tracks accurately and returns to zero (within the rifle's accuracy) everytime. For what I paid, I definitely can't complain.