my 2nd water jet / this one has a noticeably better effect on my gums even though not having a "sonic" feature. What research I've done on Water Pik shows that they have been developing this science for decades and they know what they are doing. My experience with their product attests to that.
This is my second water flosser, one for each bathroom. I seldom flossed but now I use the water flosser at least once sometimes twice a day. The first one I bought from my dentist office because they said it would make a difference to my gum health. The next cleaning will tell the tale.
My dentist suggested that I get a waterpik after research I bought this one, it's great I just went back to the dentist after a month and they stated how much better my teeth are because of the waterpik, also I don't have bad breath anymore it cleans out everything you miss with brushing and regular flossing.
I never had a water pik before and am enjoying the extra opportunity to clean between my teeth. I like having choices about the water pressure and brushes/piks. My only complaint is it runs loudly even though this is suppose to be a model with decreased noise. My dental hygienist friend recommended this brand.
I purchased the water pik about a month ago and had some issues with the first one. I called water pik and they told me to contact vendor and request a new item. I did this and it was handled in a day! That is customer service at its best.