Product review (4 stars): Easy to replace...  Price is right....
Went in OK and no leaks or drips.  I used lubricant on the O rings  (Not supplied with my order.)  I did not find the supposed 'Start Here' arrow on the label that instructions stated was there.  I just eye-balled a start by comparing an old filter with the new Waterdrop.  I have no way of testing the water quality but whatever it is, it is better than Glendale, CA tap water.