I purchased the Wp-450 WaterPik after being advised by my dental hygienist that is was important for my gum care. I wish I had purchased one years ago, my teeth and gums have never felt so clean nor been so healthy. I love the portability of this model and yet it holds a full 45 seconds worth of water, so I can clean my mouth and teeth on one filling if I want, although I enjoy the cleaning action so much that I usually use a second tankful of warm water or mouthwash. I waited 70 years too long to buy my first WaterPik!
I'm quite pleased with the product. My dentist recommended it. It took a couple of trials to remember to turn it off when I took it out of my mouth. Easy to refill and use. Nice design.
I've never liked flossing, but with the Waterpik it's very easy. It's easy to use and does a great job. I've noticed a difference in how my gums feel and whiter teeth.