The Amtrak sleeping cars are pretty nice. They're two-level; the lower level contains heads, showers, and some sleeping compartments. The upper level contains a few large rooms and a larger number of smaller, two-person rooms. The two-person rooms consist of seats that face one-another that can be reconfigured to make a single rack. There's another rack that trices up to make head-room, and that can be lowered to make the second rack. it's a bit cramped, but it's adequate and FAR better than trying to sleep sitting up in the coach cars.
The fare for the sleeping cars includes meals, but not alcohol or the gratuity.