I give the Zisc a 4 star because we really liked it, but for tough chewers, it is not a suitable choice. The material was nice and flexible- a great frisbee toy. I like the glow in the dark feature. It probably would have worked if I had used it in water activities and not just around the house. But my bizzy boy is a heavy chewer and within 2 hours it was toast. The other West Paw toys for tough chewers have been fantastic and still no wear or tear on those. True to their word, they are replacing the toy. I have chosen a replacement from their tough toy category. The Tizzi has been his fav so far. Still a fan and recommend this company!