Because of those interface concerns, and early obstacles, we weren't initially thrilled by the HR. Slowly though, it won us over -it became obvious how tough and capable the watch is. There are very few barriers for anyone who's committed to fitness.

Handles wide range of activities with GPS; GLONASS & heartrate tracking; Waterproof & highly durable; Fantastic battery life; Useful phone app; downloadable watch customizations; Hooks for HealthKit; Strava; MyFitnessPal

No touchscreen; somewhat awkward button controls; Interface lag; Can be difficult to configure; Low visibility without sunlight or backlight; Needlessly expensive for weightlifting or casual fitness

An impressive sports watch from Garmin that is only let down by its price. Casual users should look elsewhere.

Easy and intelligent configuration; Quick and accurate tracking; Rugged and long-lasting

Needs a chest strap to really shine; Basic on-screen display; Sleep tracking is so-so

As a (relatively) young tech journalist, you often find yourself reviewing gadgets that you could never feasibly afford on your salary. It's something you try not to think too much about - you'd go mad if you did.

Theres not much if anything it can't do

Its a little complicated unless you use it on a very regular basis you can forget how to find things

I have only used this on a 3-day hike through the White Mountains, but am pleased enough to write a first impressions review. I did recharge the Fenix each night using an external battery so cannot comment on whether one charge holds ups over a three-day period.

Comfortable to wear even on small wrists; Logical menu tree; Easy to upload data to activity tracking websites

Must spend extra money to buy maps from Garmin; Illumination of screens is weak; but perhaps can be changed; am not sure

Garmin's Fenix 3 is an extremely versatile multisport watch. The durable device can be used to record data from activities ranging from cycling and running, to mountaineering and skiing.

Does just about everything your cycling head unit does in a smaller package and with a strap

Expensive; notifications can be annoying; navigation

When it comes to sports tracking, things don't get more action packed than the Garmin Fenix 3. Designed for the person who's not content with a little weekend jogging, it's capable of tracking trail running, skiing, open water swimming and even gym work to name a few.

Huge array of sports; Tonnes of top level data; Looks great

Sapphire version is crazy expensive; Smartwatch features could be better; Big; bulky and masculine

Pros: The watch is very stylish and easy to use. I have used it for running and walking so far. The GPS is accurate and functional as I have grown to expect from Garmin. The sapphire bezel is very nice and durable. the thing that has impressed me so far is the battery life.

Have the watch for a month, really like it. It takes some time to learn the functionality (which I am still learning) but once you learn how to navigate the menu it's pretty easy to use.

Syncs witj my Samsung S5 no problem

None

The Garmin Fenix 3 has a problem with the altimeter. Mine, along with many others is stuck at 65,617' (20,000m). Google "Fenix 3 65,617" and see for yourself. People like myself have been contacting Garmin for over a year and keeps giving different answers to the problem.