I also knew of trainers and instructors that refused to train folks with them
and there main concern was for the person safety when CARRYING the gun, as these guns are not the MOST reliable , and the point of a GOOD conceal carry or duty gun is to be as reliable as possible
so, that was why many I knew that trained, didn;'t want them in there classes, along with many other low priced guns/
but again it was never due to the guns being UN safe to fire on a range!
it was about them trying to inform the shooter, that,this is maybe not the caliber of gun you want to BET your life on!
and to this I would honestly agree!
BACK in the 90's I knew many police officers that came into my shop wanting to buy one for a duty gun(before all the restrictions an what they can carry)
and talked many out of buying them for like reasons!
sold a lot to guys that wanted a cheap gun to waste ammo with however and never worried or felt bad selling THEM them LOL