Yep! Started riding this week, it goes from Stuttgart to Berlin and back in one day. Snacks not cheap, but you can get beer for €2,50. If they do Dusseldorf / Duisberg I might actually be able to fly to Berlin and train back. I've gone to Berlin once by train, most of the regular German trains are okay with the ICE being amazingly comfortable and fast. This falls somewhere between the two.
If I get to visit Berlin and/or Stuttgart someday, I'll be sure to ride it if it's still operational by the time. Speaking of snacks - it sounds like what the fancy hipster cafes charge for essentially simple meals. Locomore makes it sound like the ingredients are specially chosen, though. I'm not sure how much I can trust that kind of labeling at this point, but if it's true, some people are going to be willing to pay for it. Besides. Riding for mere hours on a train to another major city sounds fantastic to me as a Russian. Kemerovo (my hometown) to Moscow takes two days, with up to six people in a compartment smaller than an office restroom.
I travel biweekly to visit family. It's a 3 - 4 hour train ride and it is essentially a cross-country trip in comfortable, wifi-enabled trains like this: https://upload.wikimedia.org/wikipedia/commons/thumb/b/bc/Interieur_2e_klasse_ICMm.JPG/1920px-Interieur_2e_klasse_ICMm.JPG ...yeah, can't complain. :)