What ya have there IMO is a new take on the old OSS string holster that works for the glock etc .
http://www.warriortalk.com/showthread.php?p=617864
I used the string holster for my Mod 13 S&W three inch round butt for years IWB.
few examples of it here ....green shirt and jeans . Sorry couldn’t link to pictures.
I agree. The main difference is the weapon is totally free of the holster after the draw, and the holster completely protects the handgun from any unsafe condition while it is still attached.
One drawback is that the draw is not silent, producing a loud "clack" as the weapon is pulled free of the holster. But the sound should not be noticeable if there is the usual "bang" a fraction of a second later.