Those Sticky holsters and similar (Desantis Nemesis) are fine for pocket carry or for stowing in a bag... but seem like a very bad idea for waistband carry. What happens when you need to loosen your belt to go to the bathroom or whatever... or if your car seat or something else pulls it out of your waistband... or if you just bend over or stretch in a weird manner and your gun falls out. Could lead to a very embarrassing or even dangerous situation. If you're going to exercise your right/privilege to be armed, do it responsibly.

Pocket Carry - At a minimum have the trigger covered

IWB - Have secure belt clips and a secure holster

OWB - Have a thumb-break strap OR at least a "closed muzzle"... otherwise, a chair or something else could push the gun out of your holster when you sit

Just my two cents.