My old Miele (18 years) was sounding a bit noisy this Spring and, instead of waiting for the bearings to finally go, we took the plunge and replaced it with a Miele W1.
Rather than buying brand new, we went to their warehouse in Abingdon to get a B-Grade (40% off). Yes, we had to pay for delivery but the trek was worth it to get a machine that sales staff/service engineers had prodded for a few hours. A great move.
I was sniffy about Twin Dos, but I love it! We just quickly press a button to tell it to dose from the inbuilt bottles rather than the powder drawer. Put simply you either buy Miele detergent (they'll give you at least one set free...otherwise it is about £20 per 30 washes) or fill it with supermarket liquid(s); you tell the machine what you have put in and the doses when you refill. With a family of 3, I refill about once/month.
It is a REALLY quiet machine. There is a 20 minute quick wash (useful for just freshening things up) a power wash of about an hour (use it for school stuff) right up to hot cotton washes of about 3 hours. When we were using Miele detergent we trained the "blood stain removal" wash. DH likes the shirt program (it steams the shirts at the end in a sort of tumble so they have fewer creases).
We particularly like the timer (so we can see how much longer a cycle has to run) and it makes the familiar "Miele chime" when the wash is complete. I have LED lights in the drum that light up at the end, for some reason. I'm not sure why.
Aside from my "oven with issues", all the other Miele kit in our kitchen (induction hob/extractor/steam oven/freezer/fridge/dishwasher) have been trusty workhorses.