Your body adapts in 2 weeks. If you did the circuit above on Monday, by next Monday your body is more efficient at it. Efficiency means fewer calories burned. You must rotate your exercises. Mike Chang suggests changing your "Insane Home" routine every 7 days.
Why is this keyword taking over the fitness world again? Because people are tired of expensive gym memberships, confusing workout splits, and the "all or nothing" mentality. Mike Chang’s approach to is different. It is primal. It is hard. And most importantly, it works in your living room.
The exercises themselves may be solid (burpees, mountain climbers, squat jumps, etc.), but the "insane" results depend 80–90% on your diet consistency. If you're considering buying, check recent independent reviews (not testimonials on his sales page) and compare with free resources like Fitness Blender or Caroline Girvan on YouTube.