Mi Band 2 is is very comfortable . I am using it since form last 3 moth having lot of configurable options.
like
calorie counts
battery
Number of steps
Distance travel etc
batter life is very good for for the device . it is realy work in swimming pool while swimming first time I was afraid to put in it to water as we know Chinese product don’t have that much reliable but this product goes beyond the expectation
20 days battery life which pretty ow some thing no need to charge frequently.