I have this one and the RMR version on a G17. They are a dream to shoot and feel more like cheating than any handgun configuration I’ve tried. But as you can see concealing would be tough and even a duty holster will be larger than most would prefer.
Also the 6SM requires removal of the rear iron and you can’t use/see the front. Of course it was designed for JSOC folks to use as primary for tubular assaults and such, not family trips to the mall.
The concept of a front mounted optic is one I find intriguing but I’ll let people with more money and skill sort it out before I give it a try. If @GJM drops an attacking bear or moose with one I’ll buy one. Lol! I also wonder about balance - especially for those of us with weapon lights on our pistols.