This product's greatest strength is the strong stream of water that it delivers. This products greatest weakness is the strong stream of water that it delivers. I have yet to use WaterPik-100 without soaking myself. a nearby wall, or the bathroom mirror. I find it difficult to manipulate manually. I may well be a special case. I suffer from a certain amount of neuropathy in my hands as a result of a spinal cord injury. My wife bought the product for herself and for me on the advice of our dental hygienist. She is a fine hygienist and well-meaning but perhaps could use a bit more imagination when it comes to neuropathic users. I find the on-off switch on the pick itself difficult to control, especially when I have to shift position of the pick while I'm using it. In any event, the long and short of it is that when I use this WaterPik I always make sure that I am bare chested.