50 years of competitive bowling and The Guru instantly made the top 3 bowling balls I have ever thrown. I have three of these gems and my drilling patterns and surface tweaks allow me to use these almost everywhere. This ball gets through the fronts very clean, a very predictable ball that hits real hard and with unbelievable carry. This ball is F1 performance,can't believe there is anything else on the market that can match up with this ball.