I flew first class with Delta for the first time, and 10 things surprised me

I flew first class with Delta for the first time. I was surprised by the food, in-seat amenities, and bathroom products.
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First class on every airline in America (which is best & worst?)

I tried every first class airplane seat in America, from the cheapest to the most expensive! This travel challenge involved flying various US airlines including JetBlue, Delta, United, American ...