They are brilliant, I wouldn't be without mine, they can calculate points and its a good way of keep check of portion control. But you might want to wait until the changes have been announced just incase theres changes to the points system.
i love the scales too - i have the older white ones but even when I went off WW i still used them as normal scales! i even use them for core just as a guideline for portions so i know my portions are right for things like rice / pasta / tatties etc
i might wait until after christmas.
i dont think that it will effect the scales though, surely. regardless how they change the diet. a portion of pasta will still be the same amount of points.