I bought it for sleep phase tracking (does not work very well), 24/7 heart rate measurement (does it), for notifications about calls and messages, because. the phone is always on silent (very convenient) and for running (exceeded all expectations). Tracking the level of oxygen in the blood and the level of stress I do not understand a little, and I do not really believe in these readings. To me, it's a marketing ploy. And, well, you need a set of applications from Huawei, for comfortable use of the bracelet. In general, the bracelet came out (with discounts and bonuses) for about 2300. For the money I'm happy with everything. Vryatli there are competitors for this price. Band 6, in my subjective opinion, is not even a competitor. We are waiting for when fitness bracelets finally begin to perform all the declared functions .