Hey .I am using the product from a month and trust me this is the best product for tracking of fitness and other things like heart beat and sleeping time. The product is soo gud and gud looking that I always wear my mi band 2. The vibrating alerts during calls and messages makes kt easy to attend calls and messages. Sometimes when we are in a bus and our mobile is in our pocket and someone calls us but we are unable to get the phome as the vibration produced by the bus is much more than the phone. Soo form that time I m using my band I am not facing problems like these above mentioned. Great build quality Water proof Rust and corroison proof Dust proof Long battery life Great LED display