The fewer moving parts aspect turned out to be a huge benefit for my daughter. She was 12 and dealing with a growth spurt that took her from short to 5'8" when we bought the Hillhouse instructional videos and started practicing pitching at the house. She struggled (and still does, to some extent) with balance and keeping track of all of the body parts that have to work together to deliver a ball on target. Keeping the ball in her glove and her hands together until they separated naturally on the way up the circle helped her a lot. She got more accurate instantly. Velocity stayed pretty much the same. She is 14 now, pitching for her high school JV team. I asked her if she wanted to lengthen her very compact delivery since she is dealing with older hitters now, and she politely declined.