In 2021 we flew to Phoenix in first class on United. While the food was prepared and reheated it was FAR better than the Amtrak Flex meals. IMO, the flex meals could be good using quality food but right now they are terrible. We've had $3 TV dinners that tasted better than that stuff. We just requested a cheeseburger instead and that was far better than the flex stuff. Amtrak Eastern route sleeper passengers pay the highest prices but are served flex meals similar to what is served at the federal prisons.