Water filters have been pricey for a while. The upside is that they usually last around six months. When I found this four pack for around the same cost as what I'd have to pay for one at a certain store, I had to try them. Have to say, they are exactly what I was hoping they where. Had bought off brand ones before and at first the water tasted a little funny. Scary right. Had it tested and all was good but still. Not the case here. Water tastes great and I couldn't be happier unless they were free. Glad I found this site.