Quote: Classes are good for someone who has never been a shooter.
Strongly disagree.
At one point I taught pistol classes -- not for CCW certification but for general training of club members and those who wished to participate in our action pistol matches.
I would say overall, the newer members, in particular ladies, were FAR better students. They were not arrogant and had not developed bad habits.
Many of the "experienced" shooters had very bad habits, did not understand correct sight picture, were prone to safety violations, and were impatient.
After two 45-minute sessions or so I could usually get a new shooter doing better than many of the more experienced guys who refused to acknowledge their bad habits.
One guy got so angry when a new lady shooter (whom I had trained) beat him at her first-ever IDPA match that he said he'd never shoot another match.
All the instructors with whom I worked at my club and at commercial facilities were patient, knowledgeable, with good skills. Clearly there may be exceptions to this. But I find the above post overbroad and it sends the wrong message.
I believe the ALL CCW holders can benefit with regular practice and training.