My husband and I are using the waterpik. We are seeing that it is working great, getting more food out from between our teeth than just brushing our teeth.
The water flosser does a great job cleaning around the gum and between teeth. Much better than string flossing. Would be better if it held more than 45 seconds of water, but then it would not be very portable. With some practice I have managed to accomplish good cleaning in 45 second most of the time.