It is a real time-saving, pleasurable way for fat-burning cardio. However, this is not just "10 minutes and quit". These are 10-minute "drills", or "mini-sessions" of cardio throughout the day.

If you eat before exercise, you need more time, to start burning your stored fat. Your body needs to burn all the calories from food, before it starts to burn it's storage. So more you eat, more time you'll need. And it can take from 40 minutes to an hour just to get started! But you can get your body into fat-burning mode more quickly.