With its heart-rate monitor, Strava Live Segment alerts and compatibility with power meters and speed/cadence sensors, the M460 offers plenty of functions for the statistics geeks out there. Its four buttons, clear backlit screen and up to 16 hours of battery life make it easy to use, and it even has a built-in front light for emergencies. When you’re recording your ride, a feast of information is available, including speed, distance, time and altitude gained. They’re all easy to toggle between and clearly presented. The supplied heart-rate strap is comfortable to wear and easy to connect to the GPS unit too. If you want to connect the M460 to your computer or phone, you have to download Polar’s FlowSync software. Your data is then displayed on Polar Flow, the company’s proprietary fitness site/ app. This works well and allows syncing with Strava, as well as giving you statistical analysis of your rides. The device can store 20 Strava Live Segments, but you’ll have to pay for...