the Guru Supreme is a great compliment to the Guru Line. My Supreme is drilled straight up the Grip line about a 4.5 inch pin. The ball rolls smooth through the mid lane then makes a strong move and continues strong through the pins. Great league ball, opens up the THS. I haven't used it yet on any challenge or PBA patterns, it has been too strong to use. Not a bad problem to have. The new colors are easy to watch to get a read of the ball movement.