Recs.
Updated
Specs
Pros
Pro Water proof
While it can't deal with deep water pressure, you have nothing to worry about when washing your hands or getting it wet in the rain as it is rated IP68. You can also wash the band and unit off to remove any dust or debris that can accumulate on the underside of the central unit or in the cracks between the unit and the band without worrying at all about water damage.
Pro Brightness works well in all scenarios
The display on the Smartwatch 3 uses transflective screen technology (this is instead of IPS or OLED technology) - it reflects ambient light instead of using its own backlight. This makes it easily visible in ambient (always-on) mode even when outside in direct sunlight (as a matter of fact, that's when it is easiest to see), and also saves a lot of power in ambient mode because it doesn't require a backlight.
In a dark room, you won't be able to see the time...although this can also be counted as a pro because your wrist won't glow in dark rooms like OLED or IPS watches will.
In addition, it is one of the few smartwatches that include an ambient light sensor (required for auto brightness). So when the screen is on, it knows when to automatically turn up or down the brightness.
Pro Running companion
The built-in GPS will drain the battery quickly, but it allows you to track activity more precisely. If you go on walks or runs, apps can track them without needing to bring your phone.
Android Wear lets you sync some music onto the watch, which can be paired to bluetooth earbuds/headphones. This fully lets you leave your phone at home, and use the watch for GPS and music at the same time.
Pro USB charging
You can charge the SmartWatch 3 using the same charger that you use to charge your phone. This means that if you brake/lose your charger, it is easy and cheap to replace. It also means that if you go traveling, you can only bring one charger instead of a different one for your phone and watch.