I upgraded to Eye Mini Lite from the original Skytrak after using the Skytrak for about 4 years. I was ok with the shot delay in Skytrak, but Eye Mini Lite has literally 0 delay, and I don't think I can go back to any device with shot delay. Shot data seems consistent with Skytrak, but it also offers more data than the OG Skytrak. The most interesting data that Eye Mini Lite offers is the video of the impact moment. It's very helpful as I can see where exactly my club head touched the ball and how the path of my club head was around impact moment. Overall, I'm very happy with the purchase.