I have two Waterpics WP-100, one in each bathroom. Obviously I like the product and it does the job. However, there is no reason that small motors need to be as loud as the ones on my WP-100 are. The motors should hum not holler.
Have been a fan of WaterPik for years! But this new WaterPik seems so much more effective than my old system. I have widely spaced teeth that seem to catch everything...love the excellent job the WaterPik does to clean all surfaces.