If anyone has glanced at the online comments about Wonder they're pretty negative both in regards to the food quality and the concept, which a lot of people fear could impact locally owned restaurants or "real" food halls that can't compete with Wonder's venture capital/private equity-funded marketing and real estate budget:
Here's how the food is made, from a NY Times article:
Its kitchens don’t require gas-powered stoves and exhaust systems to vent cooking fumes, making for cheaper, quicker build-outs. Everything on the Wonder menu is designed to be cooked using three pieces of electric equipment: a hot water bath, a rapid-cook oven, and a fryer.
During a visit to Parsippany in January, Mr. Shlossman took me to see Wonder’s research and development center, a series of gleaming test kitchens staffed with dozens of professional cooks clad in Wonder-branded chef’s whites.
Wonder prepares and in many cases, par-cooks, all of its menu items in large commissary facilities, then distributes the dishes individually portioned to its restaurants, where employees can finish the preparation in a matter of minutes, with little cooking skill required. This allows the restaurants to be staffed by what Mr. Lore calls “lightly trained labor.”
A small team of chefs demonstrated how a variety of items on Wonder’s menus are cooked. Pasta alla vodka from Wonder’s Alanza menu (theme: Italian American comfort food) is heated in a rapid-cook oven for 4 minutes and 30 seconds. A strip steak from Bobby Flay Steak cooks for 6 minutes on a polymer tray that Wonder’s engineers say mimics the surface of a cast iron skillet.