Product review (4 stars): You pay for what you get
I typically only use my humidifier in the winter so I haven't tried out the new filters yet.  Since I haven't used them I cannot comment on how well they last.  However, after reading previous reviews I tried the filter in my humidifier to make sure it fit.  As others have said, the filters are taller than the manufacturer filter and won't let you put the top on as is.  Visually, they look the same as previous filters I have purchased for much more money.  Overall, considering the amount of money I saved buying them, it was worth it to me to take scissors and trim about 3/4" off the top of the filter.  As long as the price stays the same I will most likely purchase my filters from this seller the next time I need them.