Product review (1 stars): These are triggered by TIME (i.e. 6 months, then they say they need to be replaced)...  Total scam
This is one of the biggest rip offs I've seen in a long time.

This thing appears to be TIME based, meaning, it's good for 6 months, then, it sets off the bright red and somewhat alarming 'REPLACE FILTER" icon.

I've used this filter, maybe, 10 times.

That's $5 for every glass of water I've put through it.

Talk about a scam.