This location is usually less crowded than the original location which is a plus. They usually are playing great music and have vintage 80s/90s VHS playing at the bar.
The best thing about Chicago Diner in my opinion is the desserts, especially the milkshakes, all of which are incredible. My two favorite flavors are the carrot cake milkshake and the chai spice milkshake.
The sandwiches can be hit or miss depending on what is ordered. For example, the reuben and the gyros are great but the monte cristo is underwhelming and the barbecue jackfruit is pretty awful and was inedible (although I don't think it is a regular menu item or maybe it has simply been taken off the menu entirely).
If you are craving vegan diner food, Chicago Diner definitely delivers but stick to the tried and true menu favorites, and definitely get a milkshake and save room for dessert.