I just received a replacement maker for my previous unit that died during the descaling process. Not sure I'll ever try to descale this one for fear of it dying too.
I have seen Keurig machines with screens that contain inch square encyclopedias of choices, but the K-Supreme has it right. What you need to know lights the buttons you need to push and the choices that are simple enough to understand before you get your morning coffee!
I had a problem with cleaning, over the phone she patiently walked me through some tests of the coffee maker, when the tests were completed she determined it was defective and agreed to ship me a new one immediately.