I have heard of rats and mice on Amtrak trains, that the food service was horrible ... last year when an Amtrak train was stalled and in a blizzard the train was days late, and the passengers had no food and no water.
Things can only get worse with funding cuts.
With only 2 trains daily from Phila to Pittsburgh, if you don't make 2 week reservations, it is standing room only, or dirty seats next to the smelly lavatory, if and when passengers get off.