Product review (1 stars): DON'T BUY...it leaks.  2 rings are better than 1
HORRIBLE.  It leaks regardless if I use it or not.

Easy to install and it didn't affect the water-flow in my Samsung refrigerator.  However, the single rubber ring is probably not holding well because ever since I installed this filter there is a leak/puddle in the left side of the fridge.  I have to now leave a towel in the corner to soak up the leaking water that is visible.  Who knows what other water damage there could be in the back of the fridge.

I've already ordered another product but this time with a double rubber ring.