This woman waited 4 hours to try CosMc's. Here's what she thought of McDonald's new concept.

The McDonald's spinoff CosMc's was formally introduced to the public Saturday as the inaugural Illinois store opened its doors to customers for the first time.

The galactic restaurant blasted off from the get-go, according to people who visited it, requiring 20 people between local police and CosMc's staff to direct traffic around the location in Bolingbrook, a town about 30 miles outside of Chicago. McDonald's plans to open approximately 10 CosMc’s pilot locations in Texas by the end of 2024.

One woman said she waited in line for hours to get a first bite of McDonald's new limited chain, described by the company as a "small-format, beverage-led concept."

Kristina Buchthal Alkass braved what she said was a four-hour drive-thru wait to get her hands on some of the new items, which she posted about in detail on Facebook Sunday.

She shared more details about her trip with USA TODAY.

What she experienced

Opening day was full of fanfare and an extra long line, said Alkass.

Alkass described a somewhat chaotic scene on CosMc's opening day.

"I didn’t realize how long the wait would be. I may not have stayed if I had realized it," Alkass told USA TODAY. She drove in from a neighboring town and originally had her daughter and her daughter's dad waiting with her. After an hour of waiting, however, they decided to leave, something she saw several cars do during her wait. But she wanted to stay.

"I didn't want to miss the opportunity," she said. So she took the time to get some work done and listen to an online class.

Despite the long queue, Alkass said she appreciated the aesthetic of the restaurant.

There was no mistaking that McDonald's put extra care into branding, she said, as CosMc's register workers wore 1980s-style jean jackets embroidered with golden cartoon drawings and yellow CosMc's stocking caps.

There were also CosMc's theme vehicles parked outside, she said, including a VW Microbus and a branded Jeep Wrangler. CosMc's kept McDonald's iconic yellow color but did away with the equally recognizable red, instead opting for a dark navy blue.

"I want to buy some of those CosMc’s logo items, like the hat, jacket and shirt. I wish they would sell them online," she said.

What we know: CosMc's, McDonald's nostalgic spin-off coming to some cities in 2024

What she ordered

Alkass said she ordered a Creamy Avocado Tomatillo Sandwich, a Citrus and Cream Shake, Pretzel Bites with Spicy Queso and a Popping Pear Slush.

CosMc's menu described the Creamy Avocado Tomatillo Sandwich as an omelet-style egg patty with applewood bacon, creamy avocado tomatillo sauce and white cheddar cheese. Alkass said the pretzel bites were simple and classic.