I have the Mi Band and it is amazing, I also have the Amazfit Bip. The Mi Band has added to tracking my fitness level and the best feature is using it to track walks of which I used it to log my trekking through jungles, caves and mountains. Since owning them I have used them in Cambodia, Vietnam, New Zealand, Spain and the UK. My last hike was Up to the peak of Snowdonia. attached is the graphs taken from my hike in Vietnam. I will now be able to see my distance, heart rate and best of all the altitude. The battery life is great, the band is very light and comfortable to wear

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