Ranked in these QuestionsQuestion Ranking
Pro Works well with iPhone
Health apps downloaded on iPhone can be integrated with Apple Watch
Pro Haptic feedback for notifications
Pro Heart rate sensor
Pro First -rate app support
Pro Digital Crown
The Digital Crown allows you to zoom in and out with various applications and can be used as a button.
Pro Sensitive touch
Allows for taps and presses to be registered as two different types of input.
Pro Standalone phone calls
Series 3 can make and receive phone calls by itself, without the need to connect to a smartphone.
Pro Can unlock your Mac
If you have a Mac with sufficient Bluetooth chip support the Apple Watch can be used in place of your password or touch ID to login/unlock the system when in proximity.
Pro Customizable watch faces
Can customize the watch faces with "complications" such as weather forecast, traffic, meeting schedule, etc… or your own photos.
Pro Great fitness app support
The Apple Watch integrates with virtually every well-known fitness and calorie tracking app out there.
Pro Siri / Digital Assistant Support
You can use Siri directly from the Apple Watch, allowing you to call or text, but also to get directions, and more.
Apple Watch is said to cost $349 USD.
Con Works only with iPhones
You need to have an iPhone (5 or later) to pair this smartwatch. It will not work with any other device, and has limited capabilities on its own (and still require the iPhone for the initial setup).