Let's keep this brief: The Sunnto Traverse is packed with features--everything that you'd want a GPS sports watch to do. It's waterproof, has a far longer battery life than most any smartwatch you'd care to name, looks good (for a GPS watch) and is tough as nails.
But it's user interface is frustratingly byzantine. It takes multiple steps to do anything you'd care to do with the Traverse. After a few weeks of wearing it, I still found that I had problems locating the features I was looking for. But, for the price, you won't find a better piece of hardware that does what it does. For my money, however, I much prefer the Garmin Tactix Bravo, which I wear on a daily basis.
The full review, written as part of my travel-tech column, Have Gear, Will Travel, can be found here.