Product review (5 stars): This is one area I won't compromise for a cheaper product
I seriously considered ordering off-brand replacement filters because they are so much cheaper, and I have no problem using off-brand stuff in most cases. However,  I was advised by a microbiologist friend in the know that the US made filters are the only truly reliable ones to remove the nasties (including acetaminophen in the water supply) in his opinion. I drink a lot of water due to a medical issue, and acetaminophen gives me terrible migraines, so I wanted to avoid taking in any of that (even in small amounts). I received the filter on time and just popped it in. I'm very pleased, and will continue to use factory filters. This is one area that I think spending the full amount for peace of mind is worth it.

Do follow the directions carefully, and be careful with the old filter as it will probably be full of water. Run water through before drinking. I had no funny taste or smell with this filter.