Got this after having two waterpics - the large canister w/hose AC driven one, and the portable type. The canister unit finally leaked too badly to use any more, and the portable has loose heads that prevent you from controling the spray effectively. This unit works great and the heads are stable so you can aim at a specific area or tooth. The only downside is it's consumption of batteries. You can buy rechargeables but then you need to pack a charger when you travel. The irrigator breaks down to a nice compact unit for packing.