In the almost 5 years that I have had my dog (and that he has been alive) I have NEVER seen him be so crazy about a toy before. He seriously carries this thing with him all over the house, all over the yard... It barely ever leaves his sight. He even snuggles with it at night, it's sort of ridiculous.
It is extremely durable, but more chewy than a "Kong". I think the chewiness factor is why he loves it so much. He is an 82 lb pit bull mix, so he REALLY chews. He will chew threw a tennis ball in under 30 seconds, baseballs are torn to shreds in a half hour... etc. He has had this toy for about a month and hasn't even put a dent in it.
This toy also bounces when you play fetch, which is super fun for the both of us.
Anyway, I had to order him a few more in fear he might eventually lose this one and his world will fall apart. I have recommended this toy to everyone since we've purchased it. I couldn't be any happier... Or should I say "we".