Slimfast time control formula.

Hm. Hmm. Hmmmm...I just don't know about this one. Those things, no matter what they put in them, do not fill me up. For me, I could use them as a lowfat milk shake to go with a grilled chicken burger. However, as a meal replacement, eh, no way. Others seem to be able to control their hunger for the supposent four hours, but for me it is just a waste. What do YOU think?