I bought the ball immediately after its release to try it out, but I wasn't satisfied. I expected it to be a lot more durable (cracked 3 balls during my first training /2 hrs/) and it sounds and is shaped very odd. The celluloid balls are a lot better shaped (more rounded) and they don't sound like they're cracked even if they are not. Overall though you can't spot many differences between the plastic and celluloid balls, but compared to the plastic balls from other manufacturers these are not the best you can get.