Here is the quick breakdown on M5.0. It was suppose to be an extension of Isomatrix Reloaded, which was a superb casein/egg/whey blend. To make it very attractive in price, they put them in bags and added inferior ingredients, and increasing WPC. Though I'm not 100%, I'm pretty sure the blend is 80% WPC/WPI and 20% casein/egg/soy. I like the taste and think it's a great value, but it isn't a great "blend."