Have you ever purchased car insurance? If you have a nice car, don't you buy as close to Full Coverage (collision, comprehensive, medical, theft, underinsured, uninsured, towing, etc.) as you can afford? If you drive a junker, then you just buy the cheapest policy - Right? Well, do we live in a junk body, or do we live in a nice body? Know what I mean? I'm taking care of my body as well as I'm able, so I choose "full coverage" when it comes to choosing my water system. Therefore I have a reverse osmosis system!