Accommodations are pretty snug. The sleeper cabin measures six feet long and three feet high. It's not claustrophobic though, because if the upper bunk is kept folded, there is plenty of headroom. It's definitely designed for the thinner generation of the 70's: I thought there was a nice (thoughtfully carpeted so you stuff wouldn't fall off) end table where I kept my wallet and stuff at night. Turns out they were the steps to enable the more spry member of your party to vault himself into the top bunk.
Everything is built solid. Metal and glass abound. Ergonomics are a buzzword of the future. It's kept up well, but there are the usual problems of stuff that is getting old. Speakers don't work and lights don't always come on. It's not always a bad thing though. There is supposed to be a closet in the room, but it is only a few inches wide and not very practical. The closet is missing in many rooms, and that provides the perfect space for a suitcase or bag. Biggest problem quelle horreur! is that there is only one power outlet and.. and.. NO WI-FI. You would think that's a problem considering the two-day aspect of the trip, but time moves pretty quickly.
Overall it's comfortable. During the day. At night, no. The two seats in the cabin lay flat, and a mattress that is stored on the upper bunk is put on top. The seats don't meet all the way, and the mattress is thin, so you will wake up with a backache right about the spot where there is no support. What is a gentle rocking during the day becomes violent shaking at night. Also expect a cherry "Rise and shine!" from your cabin attendant no later that 7:30 AM.