The first purchase was the hardest. The cost seemed a bit high, until you do the math on what all the chemicals this one replaces cost. The softness of the water is like nothing we have ever had before. We were bromine users before, and never noticed how strong the smell was, until it was gone. Once you get your pH stabilized form a fresh fill, you never touch it again. For the ease of use and great water, the money is well worth it!