I'm so sorry I bought a Rainsoft Water System.
My system 3 years and a few months old. The expense was the same as most others you'll read about, $6000.00.
The system was amazing for the first year. Then one day, out of the blue, a couple of service guys showed up at my house to do annual PM. They commented that the timers were old models and went about changing out several parts. They charged me ~$100 when I was sure it was warranty work (but I paid anyways).
Six months later the water holding tank (large 200 gallons, i think) starting leaking from the coller at the top connection (an irreparable type thing) but when i called for service, the discovery people told me I had to pay for it. I challanged and did not have to pay anything in the end, and the tank was replaced.
A few months later it stops using bleach (that tank is 35 gallons and you have to keep it full by adding bleach and water yourself). In short I made seven service calls in seven months, and dispite my description and taking the time to meet the service guy, they made no real attempt to solve the problem. They made me call every month and that is just plain wrong.
Today I began the cycle of calling again, the exchange resulted in my getting upset and the service manager too. I have no confidence that they will repair it, but I have to make this last try before i ditch it in disgust.
My opinion is this: the sytem is a money pit. Discovery will do everything they can to not invest in the health of the equipment until the warranty expires. They will have you pay (if you are fool enough) for the warranty work they do, and if the problem is not fixed, you have to call within 30 days or you will pay again. You buy it as a warrantied system, but as i did, you will find out whatever part you need fixed is not a warranty part.
Even if I don't try to add up the annual PM expense and a few other dollars Iv'e got in it, the original expense amounts to $166 a month for good water. So, between the expense and the aggravation of having to play 'make us fix it', the system is not worth the investment and Discovery Marketing is in the grab-the-money-and-run business.