Its working pretty well for me. I have my phone on my tripod and it picks up the table well. I was getting some incorrect scoring but if you dont walk in front of the camera and replace the balls in a smooth timely manner it works very well.
Ill purchase it. Looking forward to it. Im a believer in reading, watching, and soaking up all quality instructional material out there and seeing what sticks for me. Theres good bits in every method out there.