[JohnBooty]

I've never seen a sleek, tiny watch that had GPS. The Fitbit Surge is the smallest I've seen and it's still pretty huge - more like a bracelet than a watch.

Pictures of it on actual wrists here: http://www.cnet.com/news/fitbit-charge-charge-hr-and-surge-h...

I don't know the nuts and bolts details but I think GPS has power/size requirements that preclude it from fitting in the size of something like a "normal" watch, at least until there's a major advance in battery technology.

[orbitur]

Well, the watch isn't all that tiny, and Garmin does make a line of GPS watches similar in size to the 38mm watch.

I have no comment on accuracy, as I bought the expensive and much larger Forerunner 910XT. The current top of the line Garmin is the Fenix 3, which again is similarly-sized.