Not ideal for me and most of the people I know, but far, far, far from the worst rig I've seen.
Heck, except for uncomfortable in many situations, and possibly a little difficult to get to, this rig seems quite safe and secure, for as long as its cheap construction lasts.
The direction of the muzzle is no different than an horizontal shoulder-holster, and many people give those a pass, some more reluctantly than others.
Just based on the shape of the bottom of the grip, I'm going to say that is an HK P7, one of the safest guns out there. Which makes my only thought along the lines of why is a $1200 pistol in a $12 holster.