In DANDR Atkins does have shakes in his induction menu but only twice in one week. Most of your carbs should be coming from veggies, not low carb prepackaged products. I would say shakes are fine, but I also wouldn't tell you to chug down more than one in a day. If you have a lifestyle that you can manage actually making meals and using the shakes as a treat when you are on the run then I would say that would be a much better habit to get into. Either way you decide, goodluck!

Jenn