There is really only one issue about this device that purchasers should know. Once the bristles are wet they are very soft, so you cannot expect to scrub anything off whatever surface you are cleaning. It is effective mostly as a rinsing tool. That said, the shutoff valve seemed to work fine and the fitting allowed a secure attachment to a standard garden hose. It is very light as well although with the weight of a hose full of water, you don’t really care.