>>1972828had an earlier occasion to travel to Vienna and took the sleeper train back in ze pods. 40€ to spend the night, get tra/n/sport and even a small breakfast. taking the day train would cost 35€ in 2nd class when booked in advance in comparison.
I didn't sleep much, it's still couchette comfort level after all. don't expect any soundproofing, my pod neighbors left the train 2 hours earlier, so them getting breakfast and preparing to leave the train woke me up besides the somewhat shaky ride. having the pod allows you to use the side walls to lean against them if you are a side sleeper, laying on your back might be a problem if you are tall. the provided pillow is an absolute joke, bring your own.
choose the lower bunk, there's extra space below the mattress where you can store stuff, just don't forget it before leaving the train.
for the 9 hour ride it was OK, but I wouldn't want to spend much time in ze pod awake any longer than necessary. only real advantage is the privacy, you can lie naked in ze pod if that's your thing. you still get the noise as you would in a shared couchette cabin. I think I would shell out for a bed in the sleeper car the next time.