Roma Steam Bath Roma Steam Unit Not Reliable NM

My experience with a Roam Steam Unit I owned is that it proved ultimately to be extremely unreliable.  Roma service was always polite but I spent the better part of two years fixing and replacing parts on the unit.  I decided that it would be easier to replace the Roma unit rather than having to hassle with repairing it every couple of months.  Apparently, the unit does not work in areas where there is low mineral content in the water.  It is designed so that it only produces steam from water with high mineral content.   I suspect that if you are in area with water that has high mineral content, it will work fine.   I finally had the Roma unit removed from my home and replaced with a Mr. Steam unit.  I gather it is designed in a way that the mineral content does not affect the way it produces steam. 

Thanks.