The construction of the device, the handling and the operation sound is absolutely fine. The result of the mouthwash on the other hand disappointing. As irrigator to the tooth spaces and tooth bridges satisfactory rinse completely unsuitable. The pumping capacity is despite max. Setting very weak. My defective gone TMC was great to compare. That's why I signed up for the Waterpik WP-100E decisiveness. A lot of money for an oral irrigator, but cleans at least very good. The total purchase and exchange took place without any problems thanks to Amazon. Here, kudos to Amazon. The shopping is done about this provider very customer oriented and is highly recommended to protect against Internet con men only warmly.