When I started using it, I admit that it felt weird. I never owner a sonic toothbrush before. It started out a little rough, felt like my teeth were really sensitive after cleaning. After a couple days, it proceeded into a tickle feeling, especially the gums if left there too long. I was pleased by the timer and felt, at first, that the time allotted couldn't possibly clean all that was needed but come to see that it does. Unlike previous brushes, I find that I use this one more often during the day because I like how clean I feel after brushing.