We’ve taken about half a dozen night trains during our two years of travel, and they are definitely one of my favorite modes of transportation: lower carbon footprint than flying, no need to try to entertain a child during a daytime long-haul ride, and a pleasant sense of adventure inspired by the slight sway of the carriage.
Our trip from Zurich to Berlin was our third experience on the efficient and comfortable City Night Line trains, which Deutsch Bahn seems to be in the process of phasing out. (If this makes you sad too, you can sign a petition.)