Product review (3 stars): You may have to stick with it.  Also...a secret?
Some people give this filter 5 stars.  Others give it 1 star.  Which one will you be?  My story may be useful for you.

When I installed this filter, the taste of the water it produced was awful!  I could either try to get used to the taste or not use my refrigerator's water dispenser. I sometimes have infinite patience, so... I began by dumping 5 gallons of water/  The taste was still bad. Everyday, I emptied a few cups of water. After many weeks of this, the water is now fine again.

While speaking with customer service, I learned that the color of the filter monitor (green, orange, red) is determined not by the amount of water that passes through the filter but by the number of times the water dispenser is used!  The indicator for a person who uses the water dispenser to draw a large pot of water for cooking will change color at the same rate as for someone who draws only a few sips to help swallow meds.