I purchased Fitbit charge HR last year. In the mid of 2015 fitness bands craze was at peak. I got this band at that time for 10% discount with Axis credit card. I like this band because of its some very cool features such as auto sleep log, exercise track, HR monitor which constantly keeps track of your heart beat and Calories burnt, how many stairs I have completed and last one caller ID.
Now coming to cons buckle on strap feels very mediocre considering price. But I can live up to that as I have almost lose 7 kg weight by including proper diet and fitbit in my life style in few months.
In conclusion I would suggest Fitbit charge HR to everyone who want to keep track of healthy life style.