They do not last and break really fast
When I first saw these I was excited because let's face the Braun  are really expensive but if you judge by performance these are more expensive because they break between the 1 and 2 week mark.  I have already gone through two of the brush heads and I have had these maybe a month.  A pack of eight brush heads of the braun from costco costs about forty dollars with the tax but they last me a year and never break not once but just wear out in about two month range.  I will never buy these again and I hope that future buyers of this product reads this first so you can save yourself from buying a really inferior product.
Rating: 1 stars