Product review (5 stars): Lasted 30+ days
I get more than 30days use out of this filter. The only reason I have to change it is because by 30 days, there is a mild sour odor.

When I purchased this same filter from Wal-Mart, the filter did not last 2 wks and I was using distilled water at that time. I used tap water with the filters purchased from Amazon.

Highly recommended for now...
I hope I am not disappointed with this second order...