Excellent device. You can, of course, find fault with some lack of software (the potential of the operating system is much greater than the programs made for it), and you can be upset by the absence of an oxygen level sensor. Both of these things are possible. But, the item is suitable for me in every other aspect. Has pros: The excellent work with notifications, the ability to quickly respond to a notification with a prepared phrase, and other cool exclusive features for owners of Samsung devices. The accuracy with which the heart rate is measured. The functionality of the operating system and the quality of applications from Samsung. The design of the device. The availability of contactless payment. Having certain negative aspects There is no way to measure the amount of oxygen in the blood, there is no connectivity with Google applications, and there is very limited memory (not enough to load navigator maps).