Recently I bought GolfReflection's swing monitor for my son to use to help him practice in our backyard as well as practicing on the range or even when he's playing a practice round. With good lesson and the usage of this device, I see great improvement in the fundamental of his swing in the last couple of months. I think even though the price of this device is a bit high, but I think it is actually quite worth it because he's no longer wasting my money in taking lessons which pretty much teaches the same thing over and over again because he couldn't quite master the things taught in previous lessons. Now he's much more effective on practicing the things taught in the lesson.
Anyone else has seen or use this device and has any feedback?