Instruct: Classify Amazon reviews into positive or negative sentiment
Query: An absolute must have!

I've had mine for 7 years now and found it is the by far the best way to exercise my tireless, ball-obsessed German Shepherd as well as my goofy, fetch-loving Lab mix puppy. When she was younger, I would take my Shepherd for daily 5 mile walks that would barely begin to drain her energy. This is the only thing I've found that would truly tire her out (without knocking myself out in the process). And even now at 7, she's like a puppy again every time she sees the Chuck-it come out. I had surgery on both hands this year and had a hard time throwing balls at all, never mind far enough for them to get any exercise. With this, I could still play ball with them, despite limited use of my hands. Best of all, as most other reviewers have already stated, you'll never have to touch a slimy grass-covered ball again. Kudos to the genius who created this toy!