Well, a couple weeks in and I'm still happy with it.
Things I like:
It's big, 16kg so over twice as big as the old one.
It's quiet. The old one had gotten noisier over the years, but the new one is way quieter than the old one ever was.
It does not generate nearly as much heat in the laundry room as the old one.
The clothes seem like they come out softer that the from the old one.
Light inside when you open the door (or turn on)
It's heavy. Weight is generally a good indicator of quality, the washer doesn't shake at all (so far) and the washer-dryer stack has not moved a millimeter since it was installed.
It's high. Dryer opening is at eye level, and washer is a good bit easier to get laundry in and out of.
Things I don't like:
It's black. Looks good now, but I assume it will start to look dingy with age. Probably the washer more so than the dryer.
The door is black glass, which means you can't really see the clothes tumbling unless you turn the interior light on, and then it's not great. Same with the washer.
It's heavy. Tried to slide the stack out a bit to reconfigure the hoses and I think I might have to wait for my boy to help me.
Not sure:
It has a rack that fits in the dryer that you can use to dry shoes and whatnot without them tumbling. Have not tried it yet, but it seems interesting.