I first purchased a polar watch 4 or 5 years ago, starting with the FT4. I loved it so much I upgraded to this bad boy when it first came out. & I will continue to look to Polar for my fitness tracking needs. I had tried other trackers before being recommended Polar but none of them compare. Although it doesnt have a step counter like some more popular trackers, in conjunction with the heart rate monitor strap it accurately calculates calories burned. Which in my opinion is way better. The strap goes around your chest & uses electrodes to monitor your heart rate, instead of through your wrist, which is great during exercise ! The watch uses your individual stats with your heart rate to give you an accurate calculation of calories burned. All data can be uploaded to polar flow, which will keep track of all your data. You can monitor & compare daily activity, even sleep !