Very good ball for the price. It plays like new for 2-3 sessions (not too fast, nice control). Then it loses air a bit and you can play for another 4-5 trainings until it becomes useless (low bounce) or breaks. I recommend it for robot, training and fun...

Also called Yasaka superior balls. These are actually Yasaka 2 star balls. Cheap almost like 1 star but far better. Much cheaper than 3 star and almost as good. Best for training and recreation. Medium hard, medium fast, consistent, heavy (which I like), great feel and control.
Play like new for a few hours, then start to loose air and bounce becomes lower. After 10-20 hours starts to crack and becomes useless. Best value for low price.