Supermax (short for: super-maximum security) is the name used to describe control-unit prisons, or units within prisons, which represent the most secure levels of custody in the prison systems of certain countries.
Consumer Complaints and Reviews. Outrageously expensive for services not provided: $690 - the cost to purchase your own, high-quality softener and RO filtration plus 1 year of filters and salt. $5,770 - the cost of a 3-year contract with Culligan to rent their basic softener and RO filtration with service.
The biggest factor for people choosing to rent is the financial side. A water softener can cost in excess of $1000. To most people, this one time fee is daunting and without the relevant knowledge of which to buy, many people can pay too much for the system. By breaking the payments down into a monthly pay plan (rental), the one time fee is eradicated.