We are glad that we made the purchase for the water pik and toothbrush combination. The water pik does great, but the toothbrush cuts off sometimes before the two minute cycle. It acts as if it has a short, but just when we decide to turn it back in it starts working again.
I use this an average of twice a day to brush, and 3 times a week as a water pick. Both work fine. The water pick dial works well. I can feel a difference between 2-5, for example. The battery life is about 12-16 uses.