Research has shown (Boirie, Tome, Beaufrere, etc) that micellar casein significantly inhibits protein breakdown over a seven-hour period while whey has absolutely no effect at all on protein breakdown. Yes, whey protein does stimulate protein synthesis to a greater degree, but in the end, only the casein results in a positive leucine balance. In simple terms, more protein is retained in the body with micellar casein.
What about it? Yes, it is one of the best sources of whole food prtoteins with a BV of 100, however it is absobed and is in and out of your system very quickly, and the other bad side of course is that you have to eat a shit load of eggs!