This is honestly mostly hype. You'll line up for a while for it, and then have to walk through a line of people taking a pic of their cone against the walls outside, too.
But if you move past the hipster Insta thing, the ice cream is really tasty (not hugely unique flavour wise, melts super fast, and FYI - isn't gluten or dairy free), and the people who run it seem really nice (although not the most efficient, but whatever).
Black tastes like coconut. Ube is honesty not that different from it somehow. Matcha is good, vanilla bean is... vanilla bean. They do have some sorbet, by considering the cost and lineup, you really should just go for the photographable black cone you know you came for.