I ordered burgers at Culver's, Freddy's, and Sonic. The best one was also the cheapest.
Briefly

Culver's ButterBurger was the freshest-tasting option, with a nicely toasted bun and crisp produce. It was the best of the three burgers sampled.
Sonic's cheeseburger was filling; however, the bun was soggy, which detracted from the overall experience. Nostalgic drive-in service is a highlight of the chain.
Read at Business Insider
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