I had a counter WaterPik for years and decided to buy a portable model so I could take it on the road. I have always felt it keeps my mouth the cleanest and freshest when used with brushing after meals.
After reading reviews, I guess I thought this was going to be more powerful than it was. Kind of disappointing. My hygienist warned me that the water tank would have to be refilled a lot.
I've had the WP-450 for several weeks. It works well and I like the cordless feature. But it empties too fast even at low speed. Wish I had purchased model with larger reservoir.
I have been using the WP450 for about a 5 weeks, this product is great, is helping tremendously not only with my teeth cleaning but with my gums they are healthier.