There was a new viewliner II diner (No. 68018-Montpelier) on the Crescent on our trip in May 2019 providing full traditional dining and those meals were just delicious. That is the only trip we have taken with a viewliner II diner being used as it was originally designed.
A few days later we were on the Lake Shore with another viewliner II diner (No. 68002-Atlanta) but it was being used only to serve contemporary dining. I recall passengers lining up in the aisle of the dining car to receive their bags of food at the kitchen door. Due to the line in the aisle, it was at times difficult to get in or out of the booths if you wanted to use them. Quite a contrast to the Crescent dining car a few days earlier.