MI40 review. If you’ve been looking around for a decent review of MI40, you may ask yourself - Does It Work? Does it help build muscle fast? Is it a quality program by a knowledgeable professional? You might be wondering whether this program is the best current workout and nutritional guide on fast muscle growth, or whether it’s working right now. Bear with us. Disclosure: We are a professional review site that receives compensation from the companies whose products we review. We test each product thoroughly and give high marks to only the very best. We are independently owned and the opinions expressed here are our own.