Brought this product on first day of launch itself. Band is packed with many features aside from fitness tracking. Of course there is music and volume control feature along with fitness tracking. Other useful features are : silent the phone, Alarm, timer, stopwatch, smart notification and much more. The best thing about Mi smart band 4 is unlimited watch faces. Believe me its worth the money. You can also keep any photo from your gallery and there are also third party apps for it. Fitness tracking and sleep tracking are pretty accurate. Musci control gives a lot of relief so no need to take out the phone Everytime to change the song or adjust volume. Display is very bright in direct sunlight and you can adjust the brightness from band itself. There is also additional feature which no one has talked about is custom vibrations. You can create the vibration of your like from MI Fit app and assigned individually to app alert, alarm, call etc. Battery life is amazing. It will easily last upto 10 days with access use. Build quality is also good, xiaomi has never compromised the quality. So that's all for this band and if you are looking to upgrade, don't hesitate. Just go for it. I hope you found this useful.