Worthless band. Review on Mi Band 3

I bought this band in last Diwali sale. Basically I bought this for my activity tracking like running and other exercises. But I get very disappointed when I noticed that the activity tracker is not working properly even it counts twice and thrice steps that I taken which is so an accurate. This thing is not expected from that kind of branded product which is also priced some much high. The heart rate sensor of these band is also inaccurate. WhenI try to match its ratings of heart rate sensor with professionals doctors heart rate sensor then it again showing wrong ratings. The battery life of this band is also average it gives you 12 to 13 days battery life when you connect your smartphone with this band. Moreover the touch quality of these band is also average sometime I get wrong this point when I try to navigate its feature. So my overall experience is not good so I am going to leave on you guys that you go for this bandh or not.