Product review (1 stars): These are a gamble.
This is my second purchase of a pair of these.  The first ones I purchased of this brand worked ok, although one of them made an awful noise for quite awhile until if finally stopped.  It's hard to explain the noise, but another reviewer described it like a jackhammer. haha  He's not far off.  I can only imagine that for some reason the water isn't circulating through the filter correctly and thereby causing the noise.  I can actually see water feel line shaking when I've had my fridge pulled out to see if it was something I could fix.  It's not.  It vibrates so loud that it will wake you up from your nightly slumber when the ice maker fills with water again.  This current purchase of a pair of these I'm leaving feedback for were both worthless.  BOTH of these make the noise and will not stop no matter how much water I run through them after installation in hopes to clear air out of the filter or whatever is causing the problem.  Money completely wasted and my sanity by continuously trying to get them to work.  If you purchase these then you are rolling the dice, but I didn't even have a winner out of two chances this last time.