work good value but somewhat on the softside [SEP] i am comparing it to my kids oral b original brush head first of all it is compatible but as you can see from the picture the brush head is a little bigger then the kids version and if comparing with the regular adult version it is slightly smaller comparing to the original oral b brand brush head it is a little on the soft side and if looking closely the brush looks not as good as the original one when using it it feels almost no difference however how good it is to your teeth comparing to the original one that is not something i can tell so i will leave it to the dentist but i do not think it does as good since it is soft and when brand new it brush tip looks so spread out almost like what the original one will look like after a month or two of usage the price is the best thing it is like a fraction of what the original one cost the question is how often you need to change it it maybe be as cheap as it looks if you have to change it much more frequently