Product review (4 stars): Really works!
Before switching to a filter free humidifier we tried this and it definity was more cost effective than buying multiple filters! We use the humidifier every night so prior to buying this we were changing our filter every 5-6 days which really adds up at $5 each. Once we switched to this we were able to use one filter for two months! The only thing I didn't like was the idea of using a chemical in the humidifier which we use for our babies and then breathing it in. That is why we ultimately switched to a filter free humidifier, but if you don't have that worry then I do recommend this product because it gets the job done!