1. High Spin Performance The ball firmly grips the rubber, making it easy to apply powerful spin on topspin serves and drives. • It excels in spin performance, often described as "automatically generating spin." 2. Good Bounce and Power • The hard sponge (approximately 40 degrees) provides good bounce even with strong shots, allowing for powerful balls. • Especially effective for drives and counters, making it suitable for power-oriented players. 3. Stable Ball-Holding Feel • The ball firmly grips the rubber, providing a stable ball-holding feel. • This also improves control, enabling more accurate shots. 4. Ease of Use and Adaptability • While it requires getting used to due to its strong bounce, stable shots are possible with proper swing technique. • It supports a wide range of techniques, with particularly high stability in drives and counters. I had it on a Goki Danshi racket. Used for about 2 hours, 3 times a week for 2 months.