Exactly what I have been looking for, a simple, basic, stainless-steel kettle to be used by an elderly person.  The minimum amount of water to boil is 2 cups and the maximum is 6 cups.  The exterior of the kettle is comfortably warm to touch after it comes to a full boil. There is one on-off switch that automatically turns off when the kettle has reached the boiling temperature.
The interior of the kettle is slightly discolored after the first boil, but my ordinary fifteen-year-old stainless-steel kettle that I use on the cook top is also discolored inside from use - and who looks inside their stove top tea kettle?  
I would only be dissatisfied if the electric kettle rusted. The discoloration inside the kettle from minerals in tap water doesn't concern me.  I am so far very pleased and would recommend this kettle to someone who wants a basic, easy to pour kettle that brings water to a vigorous boil.