Product review (2 stars): terrible
this generic product is probably just the same as the name-brand filter at about half the price. also check out the humidifier treatment available from the same vendor. buy enough for a whole season, and you'll save a lot of dough!

Edited 11/22/2011: After having this filter in my humidifier for less than two weeks, and consistently using the recommended amounts of bacteriostat and water treatment, this filter began to stink like a wet dog. I previously used the BestAir filter, and assumed that this brand-x filter would perform equally well, but I was wrong. I will be returning the two remaining filters, and will find a source for the BestAir filters I used to buy.