Product review (5 stars): As good as retail for less than half the price!
These just went on sale so I picked up a two pack.  I got two for less than the normal price of one retail!  That's amazing.  They replacement fit perfectly and the performance seems to be good as any name brand product.  The water tastes great.  So glad that sale hit when it did because I was in the market for new ones and I am glad I came across these!