I have used different kinds of poly balls, mostly Joola and this new 40+ from Nittaku (Japanese version). I am a heavy 2 winged looper and I will ALWAYS prefer the celluloid balls over the poly ones, but if I had to choose a poly ball to play with, it would be this one. I ordered mine about 4 months ago directly from Japan. The first thing I noticed was how hard they felt compared to the celluloid Nittaku's. They felt twice as hard as the Butterfly balls. I did notice though that all of the 6 that I ordered were perfectly round. I couldn't see any defects at all. Also, they are VERY durable. I have had 2 break, but only 1 by hitting, the other got accidently stepped on. For hours and hours of table time, only having 1 ball break is pretty good. It's just not as spinny, no matter how hard you loop the ball. There is no delay on the bounce either. No skidding of the ball as it spins on the table and then jumping up like with celluloid balls. It bounces very even no matter if it has a ton of spin or not. This threw my timing off and it will take most people some time to get used to it. This is why I rate it 4 stars....it's a good poly ball, the best poly ball, but still falls short in comparison to the celluloid. Good job though Nittaku....but there is room for improvement.
- T M, FL