Product review (1 stars): 3 outta 4 ain't bad?
Bought 3, only received 3. It even says buy 3 get one on the individual filters... I followed the instructions in the question section of the add and put 3 in my cart.

Product fits and seems to work OK so far... that buys you 1 star after lying to me.

I will edit review if/when I receive the rest of the order.