I use the irrigator Panasonic EW1211 generally for a month 2 times a day. From the cleaning effect I'm really confident. But I only use the jet-setting. In the Settings soft and normal is the water jet mixed air. To clean between the teeth he has me so soft. The tank is, unlike stationary devices, a bit small. For me, the manufacturer a good compromise between device size and tank volume is here but succeeded. When cleaning I have to fill the tank 2 times. Since it is anyway when using the shower in the sink, filling is one second matter. For me the fully charged irrigator keeps 14 days. Then they must be charged acc. Manufacturer 15 hours. Unfortunately, on the charge indicator only the connection is displayed with the network, ie, the display does not go out when the charging is completed. If the batteries after prolonged use do not have sufficient capacity more, they can be replaced. The biggest advantage of the oral irrigator is the small footprint and mobility for me.