I've been bowling for about 3 months now, and I just joined the winter league. The Hammer Hawg is my second ball since i've started bowling. This ball has incredible reaction, especially with the way i bowl. I bowl at around 18mph, heavy cranker. It flies all the way out, but always manages to come back in for the kill. So far, my league average is at around 170, i have bowled a 250 236 214 210, all in one day. When the lane breaks down just right, this ball is unstoppable. People didn't believe me when i would tell them that i've only been bowling for 3 months. I seriously feel like i'm cheating, because it feels like the ball's doing all the work for me hahaha i would definitely recommend this ball to any serious bowler. The only con is the fact that the ball likes to suck up a lot of oil, and also may over react if you're a slow bowler with heavy crank, but other wise, it's awesome