As a registered nurse, i have used this system in the facility I work and it is an excellent product. Pt""s verbalized their ability to hear once the wax comes out. Often times pt's feel a slight pop and then suddenly begin to hear again. The water temperature detector prevents water from irrigating too hot or too cold. The system will not irrigate until the water is properly adjusted. I haven't heard any complaints from pt's and I wish I could afford one for myself. Well worth the money.