It work great and it is ez to use and the best price for what is out there
It may not be 100% accurate, but it does work and gives you a good idea of your ball path. Better videos get better results and my wife and I both have found it helpful to analyze how our different balls roll.
Tried everything to make it work, literally only got a few shots to register and they were completely inaccurate. Spent 20+ games trying every angle and different video qualitys, tablets, lighting, and different lanes and even different balls. Don't waste your money this doesn't work for Android devices. S7 edge and Galaxy tab 3 neither device worked. Also had other people try recording and sending it to me also didn't work.
Fixed rotated image issue for specific Android devices.