I subscribed to the site for the first 6 weeks of doing SBD. I didn't have the book at the time, so it did help me to get started. BUT their claim that you can personalize the plan did not ring true. All the choices you could pick from are what is already in the book. Well, I already know how to mix and match my meals for the day, so this didn't really help. They did add a few new recipies but it is basically everything that is already in the book.
Dr. A nor the Nutritionist were there on a routine basis.
You could print out the menu plans from the book on a daily basis and also shopping lists for the meals that you choose.
Between 3FC and Fitday, I find that I can log and keep track of everything that I need to know and also get wonderful support FOR FREE. I would say, at this time, save your money. Maybe in the future, SB site will upgrade and then it will be worth it.
March start wt=146, goal= 130