Product review (5 stars): Great price and good taste!
I installed a cartridge the other day, ran a half gallon of water through it. There weren't many, if any residue's coming out from it.  This is a good thing! Means the filter has a lot of quality to it.
The taste of the water is very good! My 6yr old son immediately noticed the difference in taste.
I'll be ordering this more often due to the price and quality!