Going through a couple of the comments there;I don't think many of them understand what the gadget does, or watched the video related to the topic that they are commenting.
This is my favorite right next to "why I carry an XD"
...SIMPLY DON'T HOLSTER A GUN WITH A ROUND IN THE CHAMBER CONTRARY TO ALL THESE GOT TO KEEP ONE IN THE CHAMBER NUTS YOU DON'T HAVE TO ALL THE TIME. ONE IN THE CHAMBER SHOULD DEPEND ON THE SITUATION IF YOU ARE WALKING DOWN A DARK ALLEY IN A BAD PART OF TOWN CHAMBER A ROUND IF AT HOME WITH THE DOORS LOCKED AND THE ALARM ON THEN YOU PROBABLY DON'T NEED TO HAVE ONE CHAMBERED