I've tried those bars, too (with coconut) and wasn't too keen on them. Anyway, you need to subtract any sugar alcohols and fibre from the carb grams to get the net carbs that affect you if you're on Atkins.

Looking at the nutrition info on back of package -- e.g., if something has 15 grams of carbs, 12 grams of sugar alcohol and 1 gram of fibre then the carbs you would count towards your daily carbs allowance (net effective carbs) would be 2 grams. Hope this helps.