I have unfortunately gone through a few of these watches. Problems with my watch have been the following:
1. Backlight burns out frequently
2. Poor quality on the wrist band
3. Can't remove battery on your own, you have to send it back to the manufacturer or spend obscene amounts of money to have a watch maker do it (this feature has been remedied on newer models.

The concept of this watch is great, but the quality is quite poor. 3 stars

This is a decent product. The temperature, compass, and barometric pressure readings are very accurate (Keep in mind the temperature reading is about 10 degrees F higher than ambient temp when the watch is worn). The watch does not provide an accurate measure of altitude below 1000ft but that is not surprising since it relies on changes in atmospheric pressure to give the reading. All the features work well and the watch is attractive. It's very light and easy to wear. My only complaint is its thickness and one of the reasons I don't wear it all the time. It is roughly 1cm thick and it is much thicker than I am accustomed to wearing. I guess they need the room to put in all the technology associated with the features. Thinner would be more attractive though. 4 stars

Battery replacement on the older models appears to be near impossible, but here's how I figured out how to do it. It's tricky and you run the risk of damaging the unit. To replace battery:
0. Don't buy watch and stop reading, but if you already have one and the battery is toast:
1. Remove tiny screws on back of watch.
2. Carefully pry metal backplate up with a thin knife near where the band connects (the gasket is farther from the edge at this point), just enough to slip a small, sturdier screwdriver under plate. Careful not to insert the knife too far or you'll nick the gasket inside, or jam it into the electronics. You'll likely nick the outer edge of the watch which will give it more character and charisma.
3. Twist the screwdriver just enough to lift the backplate a few mm up.
4. Grab the plate with a small pair of needlenose pliers and pull up and away from the case.
5. Remove even tinier screw that holds the flimsy metal cover over the battery.
6. Invert and tap the cover and battery out.
7. Replace dead battery with new CR2032.
8. Re-assemble, and note "Smart Outdoor Products" logo on the backplate. Marvel at this little oxymoronic point, and buy a different brand that is actually designed well when this watch finally dies (or when you jab the brain trying to pop off the back cover). 2 stars

Great outdoors watch. All of their earlier problems seem corrected. Fantastic look and feel. 5 stars

I purchased this watch for my husband's birthday--since it was an REI Expert Pick and he is an REI fan...
The watch has cool features and all, but its really thick. It's having a Dell XPS on your wrist.
He works with computers, but has to take it off because it gets caught on everything.
He's also a triathlete, boy, did I get him the wrong one. 4 stars