Received the Check-GO Pro and wanted to let you know it is a vast improvement over the Check-GO. Much easier to use and marks the ball exceptionally well. I've been using the original one for about 2 years and despite it's shortcomings, it was and improvement over my old methods of marking the ball. The Pro edition is really an improvement, I actually showed it to the local Golf shop who had not seen the product yet. I'm guessing I made believers of them. It's really improved my alignment in both driving and putting the ball, good product in the vast wasteland of golf 'stuff' that ends up collecting dust. The Check-GO Pro will not.