Product review (5 stars): it seems quite good but I believe the manufacturer is way too proud ...
Tip from refrigerator repairman who replaced a part on my Kitchen-aid KFXS25RYMS0:  Buy a tube of food grade white grease -- bought mine on www.smile.amazon.com -- and whenever you replace your refrigerator filter, apply a tiny amount to gaskets and any places that touch.  This will prevent the part that seats the filter from wearing and losing its seal and leaking.  The smallest tube of this stuff will last two lifetimes.

As for the filter itself, it seems quite good but I believe the manufacturer is way too proud of its product.  Almost $100 for water filters?  Hm-m . . .