kena con,
this is marketing technique mah.

it depends on your usage, and the cleanliness of ur water la.
eg. did u install any external water filter (big gas tank)
if not ur water filter will die much faster.
oso ur pipe system, how many yrs dy, mayb inside already super dirty le.

this is msia, our water is like that 1 lol. dirty + dirty

theres nth wrong with amway filter la.

all u need to do is to change it frequently when its dirty.

n don't even buy pirated filter.
u know la outside market claimed a lot cheaper, Looks EXACTLY same filter, that 1 u will kena even more lol.

always seek for genuine filter.