Crowded. A little surely (people taking your order), greasy (in a good way), dive-ish, with tons of regulars, this is the place to get a great tasting basic burger.
While I'm not an onion lover, those onions in the grilled looked oddly tempting. Solid fries, but not the draw.
I wouldn't say "best burger ever", there are some pretty nice gourmet places in the area. But best simple, greasy burger? For sure. Can't even compare to the fast food joints. These burgers have personalities!
Take a week off your life and grab a few burgers!