Purt, I've never eaten more than half a low-carb bar (I couldn't stand the taste) but I've read a lot of posts from people who still when they're eaten. The problem, I think, is hidden carbs -- the carb counts simply aren't accurate. I'm sure there's a thread on that somewhere here, but I don't know where it is -- check the link to the right "The truth about low carb sweeteners info" I think that touches on this problem.

And check the recipes section for some great desserts that DON'T have hidden carbs. You can also conduct your own experiment. Cut them out for a week and see what happens.

Good luck!