For 4 weeks, I have the Panasonic oral irrigator, and finally look forward a powerful device, a bit bulky in my little hand, but successful in the dental cleaning and without cable !!!! A bit noisy is the motor, but that does not bother very .... Small Mankel, you have the tank of the appliance fill approximately 4x to clean upper and lower row of teeth, which takes some time, but that's the only Mankel, ease of use, powerful battery with good performance!