Let say we compare with Coway water purifier (rent to own basis) that comes with RM55 monthly installment which also covers 7 years free service, filter change, parts change, maintenance cost & warranty. After 7 years installment, total payment is RM4,620. But, we need to switch on 24 hours with very low electricity consumption since it comes with ECO power saving mode, can save up the cost you boil water using a kettle, how true is it?

Good things is that it comes with ready hot/cold/ambient  water temperature mode.

Is that really worth if consider on long term basis?