In , David Foster Wallace describes the lopsidedness of competitive teen tennis players, the forearm of their stronger sides having grown out of proportion relative to the rest of their bodies. I remembered that passage as I looked at the Polar M600 dragging my left side ever closer to the earth, wondering whether I, too, would wind up with one enlarged arm after reviewing it. The $329.95 M600 fitness tracker is a hulking beast, and I say that as someone who's hardly a petite little thing. It measures heart rate during activity, and it's sturdy, made with high-quality materials, and well designed—if you're six-foot-three. Because it's also an Android Wear smartwatch, it can do some neat things that other trackers and running watches can't, which makes it an intriguing option for anyone who can deal with its size and shortcomings. Design, Display, and Battery Life The emphasis on high-quality materials, such as Gorilla Glass and a soft silicone band, is immediately apparent with t...

Polar's latest and most impressive device to date is a three-in-one runner's watch, fitness tracker, and smartwatch. It has an optical heart rate monitor and is fully waterproof, but cramming in all that functionality means big hits on battery life and wearability.

High-quality build; Built-in optical heart rate monitor; Runs modified version of Android Wear; Waterproof; Works with both Android and iOS devices

Bulky; Short battery life; Occasionally high heart rate readings in testing; Can't set a custom activity goal

My husband that absolutely refuses to go Apple loves this thing! It's also really big I can't imagine a woman wearing it. The profile is very large. My husband can't wear it to sleep in like he did his fit bit.

Delivery was fast, product working fine. Keep it up!

Great little android wear. Pros and cons (in my opinion): Pros - Nice, clear and vibrant display. - Works with swimming. - Unit is removable from strap, and it can be changed out and cleaned properly. - Polar has a great app that syncs with other things like Strave, useful.

Great tracker.. previously used jawbone

Though the watch seems to be working for now, I am a bit wary of it. Upon opening the outer shipping box I found the inner box ripped on all sides of the clear plastic cover, that displays the watch in the store, where it had been ripped off of the box and the watch seemingly having been removed and...

Bought this instead of a Samsung Gear Fit2 Pro, where the GPS barely works ... What a difference ... GPS locks fast, the statistics seem to be fine. Polar's "Flow" app and website provide a good overview of the training. It uses it as a lock-in, and it does it with a goodbye.

The market for wrist worn wearables has broken itself down into three segments – smartwatches, activity trackers, and hardcore exercise devices. To succeed in any one of these segments generally means compromises in the areas and features that may make for a winner in another segment.

Polar isn't short of know-how when it comes to sports watches; its M400 GPS Running Watch was one of our all-time favourites. The M600 is altogether a different wrist-based wearable.

Comfortabe to run with; Accurate GPS and HRM; Water-resistant

Silicone strap picks up lint and fluff; Poor-quality display; Charging is slightly fiddly

The Polar M600 is a near-perfect combination of smartwatch and fitness tracker, blending both worlds into a true multi-functional device that is easy on the eyes and easy to use.