Granted, the covert caeey system does leave alot to be desired as far as coverage, but it also does thing leather cannot do. As far as safety If you do not put a round in the chamber when using the system the gun will not go off no matter how many times you pull the trigger if it is a concern.
I myself carry with leather, but, there must be a market for these things or they would be hard pressed to stay in business. It is just an option and personal carry methods are very personal choices each must make on his own.
Chief