I have bought the fastrack reflex half a year ago. the product feels good and comfy but lacks the heart rate sensor which the other competitive brands has got. in a much lower price. for around 1500₹; you could get the mi band 2 which has got a better bluetooth connectivity better user interface and weighs less than fastrack reflex.
Fastrack reflex has best built in quality with oled display. the battery range seems better.
Reflex has a moderate user interface. and low range bluetooth connectivity. which is very well disappointing