I did the SB diet also. Keep in mind it's not a no-carb diet. It's a complex carb (whole grains, veggies, etc) diet. The first two weeks are to break our "addiction" to carbs.

During those two weeks, it was hard to focus + I would get headaches from the withdrawl. Nowadays it's much easier to find whole grain/lean meat alternatives at every restaurant. All you need is will power to make the right choices.