I love mine... BUT

I live in California where there is a bullet button where the magazine release button is supposed to be. I have heard from three gun competitors in other states that the reason they stay away from them is because it can interfere with the release.

Anyways the core concept is speed of operating the controls and the three gun guys do just fine without it because the practice their order of operations to the point they don't think about any step.

Hope this helps