I brought this on first sale and I used this for atleast 6 months and this performance anf response is awesome and unbelievable but my bad decision I sold it for 1500 but now in market mi band is coming with only white led it is good but not that much because in my old mi band there are 7 colours combination and I use that colours for notify me as I want to like for a missed call red colour and for a facebook message blue colour but now only white I am not saying that this is bad but for me its a downgrade otherwise go for it this is a very usefull device in this range so buy this if you want to track your footsteps and your sleeping time and for future news mi upcoming band is supporting heart rate sensor so if you want this feature than wait for the right time to buy