>>1959500just pray that it isn't full, the experience is horrible in a 6 bed couchette. just check on the day you travel if you can still book couchette and hope for the best.
should have spent that 5 euros more for a 4 bed couchette. if you are on a budget book a seat in a compartment and ask the attendant if one of them is free when you travel. you can extend the seats there and lie down for the night, but you have to bring your own pillow and blanket.