Do the cardio in the morning on a near empty stomach, so just take an energy drink for breakfast and get going.
Low intensity cardio isn't as good as people say it is although obviously it does work. You could try high intensity interval training (like sprints or a fast spinning bike ride, or star jumps etc) which burns more calories than continuous exercise and raises metabolism so that even after exercise your body continues to burn fat, perhaps even for a day.
It will also increase your VO2MAX through the high effort for 15 mins, meaning your body has a higher oxygen capacity and can therefore train harder at whatever you try.
If you get your fat-loss diet into shape but do hours of cardio instead of the fifteen minute high intensity sessions, you will lose muscle that you may have because you aren't feeding your muscles adequately and yet you are demanding so much energy. That's why these short metabolism raising sessions will maintain muscle if...
about one hour after your session you eat breakfast consisting of high-glycaemic foods (with maltodextrin in) as well as protein and a lowish level of fat. The reason is that cortisol which is a catabolic hormone, is produced after the session but it aids in burning fat at the higher rate. However eating one hour afterwards even though you're starving, will prevent cortisol breaking down your muscle.
I'd say don't knock it until you've tried it
