I've used it about 10 times to fill a small air tank. Last time I turned it on it sounded like it had ball bearings in it. I ordered this large one to replace a much smaller one that I've been using for 5 years. Now we come to the guarantee. Wow! Tirewell warranty is off the wall, they send me a brand new one. THIS, OTHER COMPANIES, IS THE WAY YOU SHOULD DO ALL CUSTOMER SERVICE! Thanks to the service team! PS WOW again! It showed up just a few days after Tyrewell said he would send me a new one. I go back to the store for whatever they sell I can't live without. i love these guys Too bad my daughter is already married. Jerry