The organiser looks good but to be honest Id say youre better with a Shopping Guide, Eating out book and calculator. The Switch handbook doesnt really tell you anything you dont get at classes if I remember rightly.
i used to have the old blue calc but gave it to my sister and got the new one and the new one isn't as good as my old one, which had basic food points in it and exercise points etc.
If youre going to classes definitely not. The calculator is £7. The EO guide £2.50 and shopping guide £4.50 A Journal is £3.50 (although a notebook from WHSmith does just as well)