Alwyn Cosgrove gives the following hierarchy for Fat Loss.
1. Metabolic Resistance Training
2. High Intensity Anaerobic Interval Training
3. High Intensity Aerobic Interval Training
4. Steady State High Intensity Aerobic Training
5. Steady State Low Intensity Aerobic Training
The Maffetone Method would be #5. This is what Cosgrove says about #5:
This is just activity, going for a walk in the park, etc. It won’t burn a lot of calories; it won’t increase muscle or EPOC.
There isn’t very much research showing that low intensity aerobic training actually results in very much additional fat loss, but you’re going to have to really work to convince me that moving more is going to hurt you when you’re in fat attack mode.
So, if your priority is avoiding injury, this might be worthwhile and is probably a good place to start, but as you're able, you need to jack it up. Just keep working up the list as you're able to. If you're already highly fit and want to get ripped, #1 and #2 are what you need, but if you jump in there when you're unfit, you will get injured. Regardless of what "aerobic" program you choose, you need to do strength training as well.