Product review (5 stars): Works great at a reasonable price!
I bought this off brand due to the reasonable price.  I am very pleased with the product.  I arrived as promised and fit perfectly in the frig.  I guess I should have replaced the old one sooner because once I installed this new offbrand I had much better flow of water in the door.  At this price I will replace the cartridge once a year.  The only reason I kept the original one for so long was I thought the replacement price was ridiculous.  Now that I have the reasonably priced off brand option I will do it once a year.