Love it. Use it mainly to keep track of my physical activity. The rings - keeping track of your steps, how long you stand, and your exercise during the day are great features. You can set your goals and it keeps you on track to achieve them, notifying you when you have been inactive for too long and need to stand, and giving you encouragement along the way. Also use it to keep track of my health- my heart rate, my sleep, etc. A wealth of info at your fingertips. Wish it had blood pressure and blood oxygen monitors. Hope it will be coming in future models. Battery could be better, but it is not bad. Last a couple of days before charging and charging is quick - a couple of hours, with the Apple charger. Changing bands could not be easier and the choices on Amazon are amazing. Like all Apple devices, it works seamlessly and pairs easily with your phone. Selections for the watch face are varied and stunning - you can customize them to show the apps you use the most. Siri is much better and more responsive. Buy it! You will not regret it. Great price for an amazing device.