Best investment I've made in a long time. My teeth were noticably whiter within a few days. The toothbrush action is much milder than the older electric that I used to use; cleans without gum irritation. The water pik function is so invigorating without hurting my gums. I've recommended this to family and friends.
The box came with two brush heads, one large and one small. I've only tried the tiny one. I have tiny teeth. They seem to work well together. Why mess with success.