One month after purchase and during its 3rd or 4th use there was a sudden noise and no more vacuum. I determined the impeller "keeper" had come off the motor shaft, the impeller had flown off and was ruined, and of course no more suction. (ShopVac has sent a new power head.) Closer examination suggests the same problem may occur again--and again. The impeller is made of extrememly light aluminum, and although there is a stablizing collar on each side, the keeper is nothing more than a friction fit/push-on nut rather than a threaded fitting. In addition the attachments are cheap, and their storage and power cord storage interfere with one another. The price of this model has been dropping. I think I know why...