With the addition of Workout Builder in Training Peaks I have found it very helpful to be able to give my coaching clients specific workouts based on their FTP (power) numbers. With the addition of the Garmin Connect IQ app is the ability to have these workouts downloaded directly to their Garmin device (Edge 520,820, 1000, 1003, Forerunner 735) and walk them through the specific workout step by step on their Garmin device. Instead of having to write your workouts down on a card or keep looking at your phone your Garmin will have your workout loaded and walk you through it step by step.