The train consists of several sleeper cars (~$1k per room, at least when I bought tickets), a business class car (~$170/ticket for the whole line), several coach class cars (~$100/ticket), a dining car, and a lounge / viewing car. These are all two-level cars, with most of the excitement on the second level. Second level is where you transit between carriages, where seats are, and where the dining room is. Bottom levels have bathrooms, a limited number of accessible seats, luggage holds, the cafe, and the dining room kitchen. I, being rich enough to afford things but far too poor to afford a house, opted for the business class seat. A little more room, a free bottle of water, and -- most importantly -- fewer people to interact with.