Mixpanel’s like a microscope for user quirks. It captures every action—sign-ups, drop-offs, you name it—then paints it into funnels and cohorts that scream clarity. I’ve dug into its breakdowns to figure out why a promo flopped and flipped it into a retention win. Product teams swear by it for keeping users hooked, and the event tracking’s so granular you’ll feel like a mind reader. If growth’s your obsession, this one’s a keeper.