@dixon if you're solo or just with a partner and you're still young enough to sit in those seats for days on end and you have that much time it's probably not the worst but even at 42 I don't think my body could do the coast-to-coast trip.
Unless work is springing for the private bedrooms...
@dixon Yes. If you can possibly afford a sleeping compartment, do it. It's a unique travel experience (and one that's always in danger of disappearing) so it's worth it to do once in your life.
If talking to strangers is your thing, you will get some good stories from the people you meet in the dining car.