We are from a table tennis club in Arizona. We purchased 12 DHS ITTF approved balls to compare their performance and durability against the balls we have been using for almost 10 years, another top brand balls with premium 3-star. In performance test, we found that DHS blue 3-star balls have higher speed and more spin than the other top brand premium 3-star balls. Majority of the club members felt that the DHS blue 3-star balls are more "lively" and love them more than the other top brand premium 3-satr balls.We are still in the process of 2-week durability test. Test results so far indicated that DHS blue 3-star balls are more durable than the other top brand premium 3-star balls. After completing the durability test and confirming their durability, we will purchase DHS blue 3-star balls to replace the other top brand premium 3-star balls.