Can I get some feedback about opening a Cheesesteak restaurant in San Francisco?

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I'm from San Francisco and is kicking around the idea of opening a Cheesesteak restaurant in the area. If you are a Cheesesteak fanatic, please feel free to let me know what you think makes a good cheesesteak? What bright ideas do you have about making this cheesesteak spot unique from other cheesesteak spots? Thank you and I appreciate all of your input!