Comparing FLEX meals to Denny's is an insult to Denny's. FLEX meals are consistently bad.I think comparing the traditional dining to Denny's is a bit unfair. I would say at least as good as a decent chain restaurant like Longhorn or Outback for the flatiron steak. But Amtrak is variable enough that one's experience might not compare. The chains on land seem to do a better job at consistency.
I am sure someone wasted tons of money on he whole concept. They would have been better with Marie Callender or even Hungry Man dinners.