Product review (5 stars): Don't buy Off Brands
I had first purchased this unit - in bulk - several years ago.  When it was time to buy additional filters - I opted to purchase an "off brand" - based totally on the price.  What a mistake!  In less than 3 weeks my GE water/ice maker system started making VERY loud noises.  It was downright scary!  I wasn't certain what was the cause - but before I called a repairman - I opted to purchase this authentic GE water filter and see if there was any improvement.  Once installed - I have never heard another sound from the system!