It my full Review of Mi Band 2
Look and style vice it is improve form Mi band and look good in hand and it has nice black band and other option is there such as blue colour overall well improve from Mi Band.
Feature vice it has heart beat senser and No. of step counter is there and it track you sleep and if you sit for more time it vibrate and tell to walk sometime it has all basic senser that good thing and it is best fitness tracker in the price segment.
Battery vice it last 10 days with normal usage and it provide best battery life in this price tag. So no reason to buy other band so with this Band and you will never regret of this.
If you have other quire let me know in the comment section .