The XPAND Reaction Ball is designed to sharpen your reflexes, enhance your hand-eye coordination, and boost your footwork, critical skills for every athlete.
With its unique notched design, the ball bounces in random directions, forcing you to react quickly and stay agile on your feet.

Loved it!
Very challenging, but fun. I guess it depends on the player's level. But definitely helps. Keeps concentration, makes me move non-stop.
I really suck at this. This thing and the wall are undefeated against me. But I will use it to get better. Received as part of a bundle.
This thing is awesome!!! Hours of fun that actually benefit your tennis game. If you don't have one, get one now! In fact, get two, you won't be sorry! Keep coming up with great ideas, XPAND Team. You are a breath of fresh air in the tennis industry.