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Title: Not performing up to expectations
Review: I purchased this unit in November 2007. It is now December of the same year and the "hold" button will not release after it has been depressed until I turn the unit off. So now when my mouth fills with water, I have to turn the unit off to stop the stream of water, expel the water from my mouth, turn the unit back on and continue in this fashion until finished.The other problem I've noticed is the pressure starts out very weak and usually doesn't build until the water in the tank is about half gone.I expected more from the Waterpik Ultra, but based on it's performance thus far, I would not recommend it.
