Fitbit Surge review: a fitness tracking watch that's not quite super

Fitbit's latest fitness-tracking watch has constant heart rate monitoring, GPS and can count stair climbs, but is let down by data analysis

The Fitbit Surge is a top of the range "fitness superwatch", with constant heart rate tracking and GPS but does it really deserve that self-proclaimed "super" prefix?

The premium wrist-worn fitness tracker from Fitbit, one of the first companies to make a smartphone-connected device, the Surge claims to be able to do it all, and with a battery that lasts for days.

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Pros: solid battery life, constant heart rate monitoring, altimeter, accurate step tracking, easy to read screen

Cons: occasional syncing issues, poor data analysis, erratic heart rate during run, chunky, poor sleep tracking