I'm going to give you a generic response that floods these boards. It really is an individual thing.

It doesn't help much, I know, but it really is true. Lots of people have success eating bar and drinking shakes, but others complain about them like they're the devil. Pay attention to how you feel and see where your progress is. Or try to complicate your morning routine with a hearty breakfast for several days and see if that's the week you drop a couple pounds. If the shakes fill you up and don't make you crave junk at lunch, they're probably working fine for you.

Happy low-carbing!