P.S.,

For those of you that have just ordered an Edge, you might want to have a couple of spare 2016 batteries around (the round ones slightly smaller than a nickel.) The battery in my HRM was dead when I got it and the one in the cadence sensor was too weak to function (though it lit up the lights on reset.) My first ride out with it was to get batteries, with zip ties hanging off my bike. But it tracked my elevation gain.
So much nicer than the forerunner!

Anne