Yes, try it for one month like Cassie says, is my advice. I did Atkins for months and it is a great plan. I just prefer the CAD/CALP plan and find it fits my life a lot better than Atkins. Everyone has to find that one program that works best and then go with it.

I do advise reading the book, though. I imagine they have copies at your local library if you would rather read it first and not purchase it until you know more about the plan. There is so much information that you miss out on otherwise.