A coworker of mine was into this as a hobby for a period of time. He always carried his picks with two or three practice locks of increasing difficulty. With a few minutes explanation from him on how it works I was able to pick the easier locks within ten minutes without having done it before. I was almost tempted to get my own set and one or two of the more difficult locks just for the mental challenge. Seems it might have made for a good distraction to have during difficult times in a project and needing a break.