The "Aha!" moment: What's your favorite feature in a Product you've used recently?

We've all had those moments where we discover a feature in a product that just makes everything click. It's like finding a secret ingredient that suddenly makes a dish taste incredible. Maybe it's a shortcut that saves you time, a design aspect that makes the experience more intuitive, or even a hidden game in an app that delights you when you stumble upon it. Whatever it is, those "Aha!" moments can turn a product from good to great. I want to hear about your experiences: - What's a feature in a product you've used recently that surprised or impressed you? - If you're a maker, what's a feature you've implemented that you're particularly proud of, and why?