When I needed new brush heads for my electric toothbrush. I hesitated before buying from Amazon, because I can't be sure that the toothbrush manufacturer-brande

When I needed new brush heads for my electric toothbrush. I hesitated before buying from Amazon, because I can't be sure that the toothbrush manufacturer-branded refills there are genuine. Going with a generic, compatible refill with good reviews is preferable in this case, aside from the lower price, because presumably no one will counterfeit it. (I ended up buying the manufacturer-branded refill ... from Best Buy, not Amazon.)