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The first hour or so wasn't very difficult. It's not like I can't assess and break down the pros or cons that this machine would assist with in basic training. For instance, it helps with hand eye coordination, strengthing the reaction time. The inclusion of civilians also helps with using your mind to distiguish good from evil and assure you have the correct target before firing. The cons are the person on the screen is doing all the physical activity. You should be running and scaling those walls yourself.
But for the elementary children, it would be helpful.