This works surprising well, considering how inexpensive it is (and it's "off brand" of course!). Would give 5 stars, but after a few uses it WAS noticeably... slower? Not MAJORLY slower or anything of the sort - simply not as fast as the first couple uses. However, cleans wonderfully, helps keep plague away - especially in the back (molars), which is definitely where I tend to have more plaque build up with regular tooth brushes. Definitely great alternative to buying the $80 ones when you're on a budget! I haven't had to replace mine yet.