I used lenovo HW01 smart band since last 3 months. And I can say from my experience that this is cheapest lenovo product I used.not works properly as features given and shown in product specification.
First worst thing of this product is that it can connect bluetooth only far 5-7 meter and after it lost.battery life is also shorter around 4-5 days then they shown.
Also step count during walking is not shown accurate.i advised from my experience to all people who want to buy that don’t waste your money for this band.there are lots of other band are in market at this price.