I use oral b brush for 3 years, always purchased in supermarkets. I leave tempted by this pack of 8 brushes purchased for the attractive price (26 8 brushes instead of 11 2 stores) Immediately, I felt a difference when the first brushing, indeed one feels much less the action of the bristles of the brush relative to those I bought in stores. I thought that this might be due to a new version of the brush ... Then after 2 weeks of the brush head is detached from his body, I began to have doubts. I put a new brush, 3 weeks after my doubts .... rebelotte become serious. It's been two months that I use these brushes, I am in my 4th (an conso 2x faster than the original) and I begin to see plaque settle. It's decided the last 4 go in the trash. Be careful, the received brushes are well marked Braun Oral B, in a package that has all the original brush, but given the experience I've had, I'm sure they are (bad) counterfeits.