I have been bowling for 48 years and o f the past few years i have been using Track. The latest ball I have purchased is the 607A SE. This ball has been a true weapon in my arsenal. The action is unlike any and the impact on the pins is awesome. From the first day I used this bal I have yet to score any lower then 200. Starting the season with 176 average I am now up to 192 in two leagues. Highly recomend this ball to anyone.