We bought our Miele DW, WM, DR when renovating our first home in 1990. We took them with us (family of 5) as we moved houses, finally retiring all of them in 2014 (so 24 years' service with no service calls except to have a Miele person reinstall them at every move). The electronic controls on WM and DR died within weeks of each other (so perhaps the result of a power surge) and the DW developed a motor problem. WM and DW were replaced with current models in 2014.
At work, up till 1991, on an average every 6 months we used to burn out a Hoover WM and the drum in the Hoover dryer would disintegrate. We do 3-4 loads per day six days a week of cotton drapes and towels. Because the home appliances were working so well, I bought Miele WM and DR - the base models - for work in early 1991. They continued to work faultlessly, the only call-outs being if we jammed the pump or penetrated the internal hoses with a stray surgical instrument or errant needle left in drapes.
In 2014, we remodelled the laundry section at work and replaced the WM with the latest model Miele and the DR with a matching Miele condensing DR as it couldn't vent to the outside. The work DR came home and continues in service to this day (so 25 years old and going strong).
Our current home was originally equipped with the cheapest appliances Mirvac could supply. As they died, we replaced cooktop, rangehood and oven with Miele appliances and all work perfectly...... well one exception: the warming drawer has a switch at the back of the drawer which turns off drawer when you open it. It has failed/fallen apart twice in 10 years and is replaced by Miele at no charge.
So all in all, we are very happy users- in our hands, Miele appliances last 20+ years.