This bus is called the Reborn! Operated by Willer Express. It’s super comfy, stops every 2-3 hours at a rest stop, and they give you free slippers! Only downside is that there’s no bathroom on the bus, so you’ll have to manage your liquid intake and hold it for 2-3 hours
It just makes basic common sense. Taking the night bus or night train means you save on accommodation, and when you wake up, you basically “teleported” to your destination. You save (1) one day on travel time and (2) money for accommodation that night. Saving money AND time, what a bonus!