>We had constant issues with our fridge water dispenser using 'Samsung' water filters bought on Amazon. Out of desperation, I just bought a cheap off-brand one, hoping if it was at least being honest about not being an official product, it'd at least be functional as a replacement. All of the issues with our fridge have since vanished.
Another example: I recently needed new brush heads for my electric toothbrush. I hesitated before buying, because I can't be sure that the toothbrush manufacturer-branded refills on Amazon 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.)
Another example: I recently needed new brush heads for my electric toothbrush. I hesitated before buying, because I can't be sure that the toothbrush manufacturer-branded refills on Amazon 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.)