I bought the #1 filter for my refrigerator in Feb.  It was working fine, like all the other filters I've gotten. But a month later the water dispenser started sputtering water and making horrible noises. If I shake water out of the filter, it's fine for a fill up or 2. Too late to get refund from place of purchase. 
Bought a new filter, and so far working ok. We will see in a month.