We have a very active Border Collie mix who loves to play fetch. We have tried several frisbees (Kong, and others) on the market and the Zisc is the best! It flies straight and long distances once you get the hang of how to throw it. After rigorous use (three times a day) for months on end, it finally got a small hole in the center. Once the hole was there, it didn't take long before it was unusable. HOWEVER, we got a replacement for free!!! I called the customer service number, spoke with a REAL person, and they sent us a free Zisc in the mail in about two weeks. All I had to do was send them the original one (which cost about $2 for shipping). The second Zisc is still going strong after 8 months. I would highly recommend this frisbee!