I got to try out this device last night with my ball rep and its a great way to know all your key stats. What they do is take a basic 3 piece ball, and have you fit it to your hand like any other demo ball. There is an extra hole in the ball that you insert a mini switch grip that has basically a microchip in it to relay the data for each shot. Before each shot you pause for three seconds, this allows it to realize it's needing to record the data. Then throw your shot like normal. I threw about 8-10 shots worth of data on two separate sets and the data was nearly identical for both. You can see it for every single shot right there on the computer screen, and it also will average everything out for you as well. I do not know alot of technical data on this as i'm sure more of that will come out, but the one question I did ask was exactly how accurate is this method. He told me that they took the device to the USBC center in Texas because they wanted to disprove this device saying it wouldn't work and there were unable to do so and they in fact said it was very accurate. Hopefully this could get some more people to the demos!