Review on Introducing the Game-Changing Eye Coach by Billie Jean King: Revolutionizing the Industry by Jake Powell

It's very useful and really fun. Basically, I went from beginner to decent tennis player pretty quickly by watching tutorials on YouTube, practicing against a wall, and using the Eye Coach and other training equipment. The Eye Coach I received is well made and very easy to set up. It's great to be able to practice in an air-conditioned room when it's raining when I feel like grabbing my racquet and going to another room. Especially with the one-handed topspin backhand, which I was just beginning to learn when I bought it, I noticed a quick improvement. I use my cheaper racquet with it so it's not a problem. (You don't have to peck Eye Coach to learn from it anyway.) My girlfriend is using it now too and is gradually becoming someone I can actually go on court with and beat. I don't normally take the time to write reviews but when I had a question about my vision coach (no problem) and got great response/customer service I thought they deserved it.