This looks like a bad, bad idea. When your gun comes out of the holster its usually "oh shi*t" time and training takes over. Adding the "simple 2 steps" of attaching a light to your weapon isnt very smart. It puts your hands in front of or near the muzzle when not necessary.
They have a picture of a Cop approaching a car at a traffic stop in the ad....What do you do when the driver jumps out and wants to run or fight? What if while clearing a warehouse some dumb-*** attacks your partner? How do you reholster????
When using a firearm in Law Enforcement, training, training, training is the key to survival. Virtually all Departments/academies have specific steps to drawing and reholstering of your weapon. This is another "I know what Cops need to make their job easier" toy.