It’s a very solid companion device for the iPhone. You don’t need your phone in your hand to check notifications, send messages, or make calls. It has a slew of fitness features and health tracking if you’re into that stuff.
It’s the kind of device that’s hard to understand its true value until you have one and use it. If your friends have one you can have fitness competitions, or use the walkie talkie feature. They’re the most widely supported smart watch, with so many band options to suit your style and needs.