Product review (3 stars): Works well but $$
As D.E. mentioned, they sure don't last long for the price, at best I got three weeks. If price was seven or eight dollars each I would have rated them higher. Will wait for season to end and buy them on clearance for next year. The feature that purple turns to red when it needs replaced is nice but for me to see that I have to take humidifier apart. With mine I can tell the filter needs replaced when it stops absorbing water. Wish they lasted longer for the price because they do work well and are easy to replace.