I do believe there is a point of diminishing returns with 3 v. 3 It's a great game, because it demands good technical skills, and teaches kids how to use passing triangles. However, at the higher levels of the tournaments you start running into teams that have practiced patterns and timed runs to such a degree that you begin to wonder whether the game has become more about learning how to play "3 v. 3" than how to play soccer. In other words, there may be a point where you might be better off doing something else. Overall, though, I think it's a positive experience.