Product review (3 stars): If you are wondering why your water tastes bad it may not be the filter.
I purchase a new Whirlpool French Door Fridge earlier this month.  After running 4 gallons through, and dumping the first few batches of ice  the water was funky.  The water had a bad chemical plastic taste that did not diminish with additional flushing.  I read several reviews on the previous generation filter (same as my new fridge) with the same complaint.  I was ready to send the fridge back.  I did a little information gathering on appliance repair sites and discovered source of the problem and occam's razor came to mind.  It was the new steel braided ice maker supply line (mine was a Watts brand made in China) I bought it new for the fridge.  Read reviews of various ice maker supply lines and you will see there is a serious problem with many manufacturers.

Anyway I ordered a Whirlpool 8212547RP 5-Feet Pex Ice Maker Hook-up Kit from Amazon for about 8 bucks with tax (same material as the rest of the fridge's plumbing) and the water tastes fine now.  I replaced my original filter just because I considered the original to be contaminated.  The new filter tastes fine, although I am docking stars for the high price, although I imagine that it will come down in price as its a new product with limited supply at the moment.

If you are suffering from that chemical taste: unless you have a copper, pex or a quality confirmed ice make supply line then you owe it to yourself to at least test it.  Pull your fridge out, turn the supply valve off, disconnect the supply line from the fridge.  Fill a glass with water directly from the supply line and taste it.  If it tastes worse than tap then you know its the ice maker supply line.

I honestly wonder about the economics of how many refrigerators and filters have been returned because the ice maker supply line is of poor quality.