I upgraded my room on a 30-hour Amtrak ride. The additional 20 square feet of space was worth the extra $500.
The Amtrak bedroom was twice the size of the roomette and included a couch and an enclosed bathroom with a shower.
I spent $1,000 to have a room to myself on a 30-hour Amtrak ride. It was the best experience I've had on an overnight train in the US.
I've traveled on overnight trains in the US and Europe. My experience in an Amtrak bedroom was the most comfortable in the US ...