It caught a lot of attention of my 7-month GSP puppy, but item definitely should not be positioned as "for toughest chewers". Although it looked pretty reliable at the beginning in the bag, but on practice, almost the whole green part of the toy was destroyed by my dog less than in 10 minutes of playing and chewing. Nothing lasts forever, but 10 minutes - it's too short...
Though, I would say that it would be a nice toy if your dog is not tough chewer. Could also survive longer for smaller puppy (3-4 months) probably, but if it's puppy and small breed, it will be pretty heavy for dog to play with this toy.