I bought the GenX because you can do remote and contact simultaneously. I almost died from mold exposure 3 years ago. But have been dealing with health issues since. Chronic fatigue is the worst. I’ve only been using this a few days and am already noticing a difference. No Herx. For me, when I used the chronic fatigue program I started feeling better. My brain fog started clearing. Cfs isn’t about body fatigue as much as it’s about your brain shutting down. Debilitating.