i bought 1 of these balls back in february and took it to school every day for 2 months, the ball is amazingly strong, unlike soccer balls, this ball does not pop when it lands in thorns or anything. Although 2 months isnt a long time, the only reason mine popped, was because it went through so much throwing and thrashing, it landed on a spiked fence, millions of thorn bushes, and skidded across the concrete every day and wouldnt pop. Eventually, the ball did have to go, the rubber inner tube started to pop through the ball and it stopped working properly so i popped it. But in all the ball is very good, if your planning on using it on grass only, it will probably last you a life time.
VERY STRONG, VERY GOOD.