ProGlider -9 Youth Baseball Swing Trainer with 3 Balls – 30” 21oz. Revolutionary baseball training device that teaches fundamental swing mechanics

Really shows the kids what we are talking about with their swing shows them immediately. Drop the shoulder ball goes opposite the batter right into the dirt foul, cast out or roll over ball goes foul batter side, correct swing ball goes straight. Overall it's pretty good it does create a slight push swing (atleast that's how it feels to me sometimes) but easy to fix that once they are swinging on plane. The weight is close to game bat weight maybe a little heavier but it's good for building strength and speed. Have to go to their website to order extra balls though 3 just isn't enough

Works well, tried this on a recommendation from a friend and it works well. It is a little overpriced though. But it seems to show some flaws with the feedback.