I too was not very impressed with the seats or overhead bins on the Acella Express, but meals, dining car/cafe, bathrooms, etc. were nice. I keep trying to talk friends in to having races BOS to NYC with train and plane, but most people are not such travel hobbiests. I guess I should have been a travel reporter.
I do think overall the Acella was over hypped, etc., and airline bonus mile offers are more generous typically.