The design of the removable brush head is poor. It has several holes a large one where it attaches to the handle, a smaller hole next to it, two at the top next to the brush head, and three small ones at the back of the bristles. All of these holes are connected internally, meaning the drool from your toothpaste flows through the holes next to the brush and out the other holes, dripping all over you. Hold the handle of the toothbrush high above your mouth so that gravity keeps the toothpaste in your mouth instead of on your clothes and the floor. This design also allows the toothpaste to seep all the way around the removable head and where it attaches to the handle, causing the liquid to vibrate and become stronger. The instructions say to take the toothbrush apart after each use and rinse the brush head and the area where the handle attaches. If you dont, things will get nasty very quickly. I dont understand how such a poor design made it past the initial testing stage, let alone into the final product. Aside from the brush head design, the handle is very good. It has three modes normal, gentle, and oscillating between the two. Its a little louder than Id like, but thats not too bad.