We found this at a local natural pet store for our 1 yr. old pup (pure full-size Australian Shepherd - very alpha male). He has a fondness of finding any small flaw in toys and exploiting them to destroy toys as soon as possible. Most (but not all) Kong toys are the only ones before this he didn't kill.
Just over 6 months of aggressive chewing, pulling, & throwing and other than a bit dirty it's just like new. No tears or chewed/frayed bits.
We loved it so much we decided to give one to a friend with 2 bull terriers to try. They are far more aggressive chewers/pullers than my dog - and there are 2 of them pulling at opposite ends. Honestly we thought very likely it would be destroyed within 10 min. Like us however several months and the toy is still going strong!! Highly recommend.