Unlike our pervious frig and filter, this one required us to run through more than 4 gallons of water before it became clear. It turns clear after continuous running through a few gallons. But after not using it for a short time, milkiness returns and we had to run through more gallons. Not satisfactory. 
Same complaint others expressed. Not sure the nature of the particles that cause the milkiness. I will call them to find out. After many gallons and the water turned clear, we had it tested by the local water department. They can only test for organic material (not PVC,etc.) The test showed the water clean of organic material and choline.
The initial smelly water was corrected by changing out the flexible hose that connects the water supply to the frig with copper. Now recommended by Whirlpool and dealer.